## Uses of Interface
io.vertx.core.AsyncResult

- Packages that use AsyncResult
  Package | Description
  --- | ---
  io.vertx.config.spi.utils |
  io.vertx.config.vault.client |
  io.vertx.core |
  io.vertx.ext.auth.audit |
  io.vertx.ext.shell.spi |
  io.vertx.ext.unit |
  io.vertx.ext.web |
  io.vertx.ext.web.client.spi |
  io.vertx.ext.web.codec |
  io.vertx.junit5 |
  io.vertx.lang.groovy |
  io.vertx.reactivex |
  io.vertx.reactivex.core |
  io.vertx.reactivex.ext.auth.audit |
  io.vertx.reactivex.ext.bridge |
  io.vertx.reactivex.ext.eventbus.bridge.tcp |
  io.vertx.reactivex.ext.unit |
  io.vertx.reactivex.ext.web |
  io.vertx.reactivex.ext.web.handler.graphql.ws |
  io.vertx.reactivex.ext.web.handler.sockjs |
  io.vertx.rxjava3 |
  io.vertx.rxjava3.core |
  io.vertx.rxjava3.ext.auth.audit |
  io.vertx.rxjava3.ext.bridge |
  io.vertx.rxjava3.ext.eventbus.bridge.tcp |
  io.vertx.rxjava3.ext.unit |
  io.vertx.rxjava3.ext.web |
  io.vertx.rxjava3.ext.web.handler.graphql.ws |
  io.vertx.rxjava3.ext.web.handler.sockjs |
  io.vertx.servicediscovery.backend.redis |
  io.vertx.servicediscovery.spi |
  io.vertx.serviceproxy |

- - ### Uses of AsyncResult in io.vertx.config.spi.utils

    Method parameters in io.vertx.config.spi.utils with type arguments of type AsyncResult
    Modifier and Type | Method | Description
    --- | --- | ---
    `void` | FileSet.`buildConfiguration​(List<File> files, Handler<AsyncResult<JsonObject>> handler)` | Iterates over the given set of files, and for each matching file, computes the resulting configuration.

  - ### Uses of AsyncResult in io.vertx.config.vault.client

    Methods in io.vertx.config.vault.client that return AsyncResult
    Modifier and Type | Method | Description
    --- | --- | ---
    `static <T> AsyncResult<T>` | VaultException.`toFailure​(String message)` |

  - ### Uses of AsyncResult in io.vertx.core

    Subinterfaces of AsyncResult in io.vertx.core
    Modifier and Type | Interface | Description
    --- | --- | ---
    `interface` | `CompositeFuture` | The composite future wraps a list of `futures`, it is useful when several futures needs to be coordinated.
    `interface` | `Future<T>` | Represents the result of an action that may, or may not, have occurred yet.
    `interface` | `Timer` | A timer task that can be used as a future.

    Methods in io.vertx.core that return AsyncResult
    Modifier and Type | Method | Description
    --- | --- | ---
    `default <U> AsyncResult<U>` | AsyncResult.`map​(java.util.function.Function<? super T,​U> mapper)` | Apply a `mapper` function on this async result.
    `default <V> AsyncResult<V>` | AsyncResult.`map​(V value)` | Map the result of this async result to a specific `value`.
    `default <V> AsyncResult<V>` | AsyncResult.`mapEmpty()` | Map the result of this async result to `null`.
    `default AsyncResult<T>` | AsyncResult.`otherwise​(java.util.function.Function<Throwable,​T> mapper)` | Apply a `mapper` function on this async result.
    `default AsyncResult<T>` | AsyncResult.`otherwise​(T value)` | Map the failure of this async result to a specific `value`.
    `default AsyncResult<T>` | AsyncResult.`otherwiseEmpty()` | Map the failure of this async result to `null`.

    Methods in io.vertx.core with parameters of type AsyncResult
    Modifier and Type | Method | Description
    --- | --- | ---
    `default void` | Promise.`handle​(AsyncResult<T> asyncResult)` | Succeed or fail this promise with the `AsyncResult` event.

    Method parameters in io.vertx.core with type arguments of type AsyncResult
    Modifier and Type | Method | Description
    --- | --- | ---
    `default Future<T>` | Future.`andThen​(Handler<AsyncResult<T>> handler)` | Invokes the given `handler` upon completion.
    `CompositeFuture` | CompositeFuture.`onComplete​(Handler<AsyncResult<CompositeFuture>> handler)` |
    `Future<T>` | Future.`onComplete​(Handler<AsyncResult<T>> handler)` | Add a handler to be notified of the result.
    `<U> Future<U>` | Future.`transform​(java.util.function.Function<AsyncResult<T>,​Future<U>> mapper)` | Transform this future with a `mapper` function.

  - ### Uses of AsyncResult in io.vertx.ext.auth.audit

    Methods in io.vertx.ext.auth.audit that return types with arguments of type AsyncResult
    Modifier and Type | Method | Description
    --- | --- | ---
    `default <T> Handler<AsyncResult<T>>` | SecurityAudit.`auditHandlerFor​(Marker marker)` |

  - ### Uses of AsyncResult in io.vertx.ext.shell.spi

    Method parameters in io.vertx.ext.shell.spi with type arguments of type AsyncResult
    Modifier and Type | Method | Description
    --- | --- | ---
    `void` | CommandResolverFactory.`resolver​(Vertx vertx, Handler<AsyncResult<CommandResolver>> resolveHandler)` | Obtain a command resolver for a Vert.x instance.

  - ### Uses of AsyncResult in io.vertx.ext.unit

    Methods in io.vertx.ext.unit that return types with arguments of type AsyncResult
    Modifier and Type | Method | Description
    --- | --- | ---
    `<T> Handler<AsyncResult<T>>` | TestContext.`asyncAssertFailure()` | Creates and returns a new async handler, the returned handler controls the completion of the test.
    `<T> Handler<AsyncResult<T>>` | TestContext.`asyncAssertFailure​(Handler<Throwable> causeHandler)` | Creates and returns a new async handler, the returned handler controls the completion of the test.
    `<T> Handler<AsyncResult<T>>` | TestContext.`asyncAssertSuccess()` | Creates and returns a new async handler, the returned handler controls the completion of the test.
    `<T> Handler<AsyncResult<T>>` | TestContext.`asyncAssertSuccess​(Handler<T> resultHandler)` | Creates and returns a new async handler, the returned handler controls the completion of the test.

    Method parameters in io.vertx.ext.unit with type arguments of type AsyncResult
    Modifier and Type | Method | Description
    --- | --- | ---
    `void` | Completion.`handler​(Handler<AsyncResult<T>> completionHandler)` | Completion handler to receive a completion signal when this completions completes.

  - ### Uses of AsyncResult in io.vertx.ext.web

    Method parameters in io.vertx.ext.web with type arguments of type AsyncResult
    Modifier and Type | Method | Description
    --- | --- | ---
    `int` | RoutingContext.`addEndHandler​(Handler<AsyncResult<Void>> handler)` | Add an end handler for the request/response context.

  - ### Uses of AsyncResult in io.vertx.ext.web.client.spi

    Method parameters in io.vertx.ext.web.client.spi with type arguments of type AsyncResult
    Modifier and Type | Method | Description
    --- | --- | ---
    `default void` | CacheStore.`delete​(io.vertx.ext.web.client.impl.cache.CacheKey key, Handler<AsyncResult<Void>> handler)` | Delete all variations of a key from the cache.
    `default void` | CacheStore.`flush​(Handler<AsyncResult<Void>> handler)` | Delete all entries from the cache.
    `default void` | CacheStore.`get​(io.vertx.ext.web.client.impl.cache.CacheKey key, Handler<AsyncResult<io.vertx.ext.web.client.impl.cache.CachedHttpResponse>> handler)` | Retrieve a cached response.
    `default void` | CacheStore.`set​(io.vertx.ext.web.client.impl.cache.CacheKey key, io.vertx.ext.web.client.impl.cache.CachedHttpResponse response, Handler<AsyncResult<io.vertx.ext.web.client.impl.cache.CachedHttpResponse>> handler)` | Add a response in the cache with the given key.

  - ### Uses of AsyncResult in io.vertx.ext.web.codec

    Method parameters in io.vertx.ext.web.codec with type arguments of type AsyncResult
    Modifier and Type | Method | Description
    --- | --- | ---
    `void` | BodyCodec.`create​(Handler<AsyncResult<BodyStream<T>>> handler)` | Create the `BodyStream`.

  - ### Uses of AsyncResult in io.vertx.junit5

    Methods in io.vertx.junit5 that return types with arguments of type AsyncResult
    Modifier and Type | Method | Description
    --- | --- | ---
    `<T> Handler<AsyncResult<T>>` | VertxTestContext.`completing()` | Deprecated. Use `VertxTestContext.succeedingThenComplete()` instead.
    `<T> Handler<AsyncResult<T>>` | VertxTestContext.`failing()` | Deprecated. Use `VertxTestContext.failingThenComplete()` or `VertxTestContext.failing(Handler)`, for example `failing(e -> checkpoint.flag())`, `failing(e -> { more testing code })`, or `failing(e -> {})`.
    `<T> Handler<AsyncResult<T>>` | VertxTestContext.`failing​(Handler<Throwable> nextHandler)` | Create an asynchronous result handler that expects a failure, and passes the exception to another handler.
    `<T> Handler<AsyncResult<T>>` | VertxTestContext.`failingThenComplete()` | Create an asynchronous result handler that expects a failure to then complete the test context.
    `<T> Handler<AsyncResult<T>>` | VertxTestContext.`succeeding()` | Deprecated. Use `VertxTestContext.succeedingThenComplete()` or `VertxTestContext.succeeding(Handler)`, for example `succeeding(value -> checkpoint.flag())`, `succeeding(value -> { more testing code })`, or `succeeding(value -> {})`.
    `<T> Handler<AsyncResult<T>>` | VertxTestContext.`succeeding​(Handler<T> nextHandler)` | Create an asynchronous result handler that expects a success, and passes the value to another handler.
    `<T> Handler<AsyncResult<T>>` | VertxTestContext.`succeedingThenComplete()` | Create an asynchronous result handler that expects a success to then complete the test context.

  - ### Uses of AsyncResult in io.vertx.lang.groovy

    Methods in io.vertx.lang.groovy with parameters of type AsyncResult
    Modifier and Type | Method | Description
    --- | --- | ---
    `static boolean` | VertxExtensionModule.`asBoolean​(AsyncResult self)` | Coerces an `AsyncResult` as a boolean value according to Groovy-Truth.

  - ### Uses of AsyncResult in io.vertx.reactivex

    Method parameters in io.vertx.reactivex with type arguments of type AsyncResult
    Modifier and Type | Method | Description
    --- | --- | ---
    `static Completable` | CompletableHelper.`toCompletable​(java.util.function.Consumer<Handler<AsyncResult<Void>>> handler)` | Returns a `Completable` that, when subscribed, uses the provided `handler` to adapt a callback-based asynchronous method.
    `static <T> Maybe<T>` | MaybeHelper.`toMaybe​(java.util.function.Consumer<Handler<AsyncResult<T>>> handler)` | Returns a `Maybe` that, when subscribed, uses the provided `handler` to adapt a callback-based asynchronous method.
    `static <T> CompletableObserver` | CompletableHelper.`toObserver​(Handler<AsyncResult<T>> handler)` | Adapts an Vert.x `Handler<AsyncResult<T>>` to an RxJava2 `SingleObserver`.
    `static <T> MaybeObserver<T>` | MaybeHelper.`toObserver​(Handler<AsyncResult<T>> handler)` | Adapts an Vert.x `Handler<AsyncResult<T>>` to an RxJava2 `MaybeObserver`.
    `static <T> SingleObserver<T>` | SingleHelper.`toObserver​(Handler<AsyncResult<T>> handler)` | Adapts an Vert.x `Handler<AsyncResult<T>>` to an RxJava2 `SingleObserver`.
    `static <T> Single<T>` | SingleHelper.`toSingle​(java.util.function.Consumer<Handler<AsyncResult<T>>> handler)` | Returns a `Single` that, when subscribed, uses the provided `handler` to adapt a callback-based asynchronous method.

  - ### Uses of AsyncResult in io.vertx.reactivex.core

    Methods in io.vertx.reactivex.core with parameters of type AsyncResult
    Modifier and Type | Method | Description
    --- | --- | ---
    `void` | Promise.`handle​(AsyncResult<T> asyncResult)` | Succeed or fail this promise with the `AsyncResult` event.

  - ### Uses of AsyncResult in io.vertx.reactivex.ext.auth.audit

    Methods in io.vertx.reactivex.ext.auth.audit that return types with arguments of type AsyncResult
    Modifier and Type | Method | Description
    --- | --- | ---
    `<T> Handler<AsyncResult<T>>` | SecurityAudit.`auditHandlerFor​(Marker marker)` |

  - ### Uses of AsyncResult in io.vertx.reactivex.ext.bridge

    Methods in io.vertx.reactivex.ext.bridge with parameters of type AsyncResult
    Modifier and Type | Method | Description
    --- | --- | ---
    `void` | BaseBridgeEvent.`handle​(AsyncResult<Boolean> asyncResult)` | Succeed or fail this promise with the event.

  - ### Uses of AsyncResult in io.vertx.reactivex.ext.eventbus.bridge.tcp

    Methods in io.vertx.reactivex.ext.eventbus.bridge.tcp with parameters of type AsyncResult
    Modifier and Type | Method | Description
    --- | --- | ---
    `void` | BridgeEvent.`handle​(AsyncResult<Boolean> asyncResult)` | Succeed or fail this promise with the event.

  - ### Uses of AsyncResult in io.vertx.reactivex.ext.unit

    Methods in io.vertx.reactivex.ext.unit that return types with arguments of type AsyncResult
    Modifier and Type | Method | Description
    --- | --- | ---
    `<T> Handler<AsyncResult<T>>` | TestContext.`asyncAssertFailure()` | Creates and returns a new async handler, the returned handler controls the completion of the test.
    `<T> Handler<AsyncResult<T>>` | TestContext.`asyncAssertFailure​(Handler<Throwable> causeHandler)` | Creates and returns a new async handler, the returned handler controls the completion of the test.
    `<T> Handler<AsyncResult<T>>` | TestContext.`asyncAssertSuccess()` | Creates and returns a new async handler, the returned handler controls the completion of the test.
    `<T> Handler<AsyncResult<T>>` | TestContext.`asyncAssertSuccess​(Handler<T> resultHandler)` | Creates and returns a new async handler, the returned handler controls the completion of the test.

    Method parameters in io.vertx.reactivex.ext.unit with type arguments of type AsyncResult
    Modifier and Type | Method | Description
    --- | --- | ---
    `void` | Async.`handler​(Handler<AsyncResult<Void>> completionHandler)` | Completion handler to receive a completion signal when this completions completes.
    `void` | Completion.`handler​(Handler<AsyncResult<T>> completionHandler)` | Completion handler to receive a completion signal when this completions completes.
    `void` | TestCompletion.`handler​(Handler<AsyncResult<Void>> completionHandler)` | Completion handler to receive a completion signal when this completions completes.

  - ### Uses of AsyncResult in io.vertx.reactivex.ext.web

    Method parameters in io.vertx.reactivex.ext.web with type arguments of type AsyncResult
    Modifier and Type | Method | Description
    --- | --- | ---
    `int` | RoutingContext.`addEndHandler​(Handler<AsyncResult<Void>> handler)` | Add an end handler for the request/response context.

  - ### Uses of AsyncResult in io.vertx.reactivex.ext.web.handler.graphql.ws

    Methods in io.vertx.reactivex.ext.web.handler.graphql.ws with parameters of type AsyncResult
    Modifier and Type | Method | Description
    --- | --- | ---
    `void` | ConnectionInitEvent.`handle​(AsyncResult<Object> asyncResult)` | Succeed or fail this promise with the event.

  - ### Uses of AsyncResult in io.vertx.reactivex.ext.web.handler.sockjs

    Methods in io.vertx.reactivex.ext.web.handler.sockjs with parameters of type AsyncResult
    Modifier and Type | Method | Description
    --- | --- | ---
    `void` | BridgeEvent.`handle​(AsyncResult<Boolean> asyncResult)` | Succeed or fail this promise with the event.

  - ### Uses of AsyncResult in io.vertx.rxjava3

    Method parameters in io.vertx.rxjava3 with type arguments of type AsyncResult
    Modifier and Type | Method | Description
    --- | --- | ---
    `static Completable` | CompletableHelper.`toCompletable​(java.util.function.Consumer<Handler<AsyncResult<Void>>> handler)` | Returns a `Completable` that, when subscribed, uses the provided `handler` to adapt a callback-based asynchronous method.
    `static <T> Maybe<T>` | MaybeHelper.`toMaybe​(java.util.function.Consumer<Handler<AsyncResult<T>>> handler)` | Returns a `Maybe` that, when subscribed, uses the provided `handler` to adapt a callback-based asynchronous method.
    `static <T> CompletableObserver` | CompletableHelper.`toObserver​(Handler<AsyncResult<T>> handler)` | Adapts an Vert.x `Handler<AsyncResult<T>>` to an RxJava2 `SingleObserver`.
    `static <T> MaybeObserver<T>` | MaybeHelper.`toObserver​(Handler<AsyncResult<T>> handler)` | Adapts an Vert.x `Handler<AsyncResult<T>>` to an RxJava2 `MaybeObserver`.
    `static <T> SingleObserver<T>` | SingleHelper.`toObserver​(Handler<AsyncResult<T>> handler)` | Adapts an Vert.x `Handler<AsyncResult<T>>` to an RxJava2 `SingleObserver`.
    `static <T> Single<T>` | SingleHelper.`toSingle​(java.util.function.Consumer<Handler<AsyncResult<T>>> handler)` | Returns a `Single` that, when subscribed, uses the provided `handler` to adapt a callback-based asynchronous method.

  - ### Uses of AsyncResult in io.vertx.rxjava3.core

    Methods in io.vertx.rxjava3.core with parameters of type AsyncResult
    Modifier and Type | Method | Description
    --- | --- | ---
    `void` | Promise.`handle​(AsyncResult<T> asyncResult)` | Succeed or fail this promise with the `AsyncResult` event.

  - ### Uses of AsyncResult in io.vertx.rxjava3.ext.auth.audit

    Methods in io.vertx.rxjava3.ext.auth.audit that return types with arguments of type AsyncResult
    Modifier and Type | Method | Description
    --- | --- | ---
    `<T> Handler<AsyncResult<T>>` | SecurityAudit.`auditHandlerFor​(Marker marker)` |

  - ### Uses of AsyncResult in io.vertx.rxjava3.ext.bridge

    Methods in io.vertx.rxjava3.ext.bridge with parameters of type AsyncResult
    Modifier and Type | Method | Description
    --- | --- | ---
    `void` | BaseBridgeEvent.`handle​(AsyncResult<Boolean> asyncResult)` | Succeed or fail this promise with the event.

  - ### Uses of AsyncResult in io.vertx.rxjava3.ext.eventbus.bridge.tcp

    Methods in io.vertx.rxjava3.ext.eventbus.bridge.tcp with parameters of type AsyncResult
    Modifier and Type | Method | Description
    --- | --- | ---
    `void` | BridgeEvent.`handle​(AsyncResult<Boolean> asyncResult)` | Succeed or fail this promise with the event.

  - ### Uses of AsyncResult in io.vertx.rxjava3.ext.unit

    Methods in io.vertx.rxjava3.ext.unit that return types with arguments of type AsyncResult
    Modifier and Type | Method | Description
    --- | --- | ---
    `<T> Handler<AsyncResult<T>>` | TestContext.`asyncAssertFailure()` | Creates and returns a new async handler, the returned handler controls the completion of the test.
    `<T> Handler<AsyncResult<T>>` | TestContext.`asyncAssertFailure​(Handler<Throwable> causeHandler)` | Creates and returns a new async handler, the returned handler controls the completion of the test.
    `<T> Handler<AsyncResult<T>>` | TestContext.`asyncAssertSuccess()` | Creates and returns a new async handler, the returned handler controls the completion of the test.
    `<T> Handler<AsyncResult<T>>` | TestContext.`asyncAssertSuccess​(Handler<T> resultHandler)` | Creates and returns a new async handler, the returned handler controls the completion of the test.

    Method parameters in io.vertx.rxjava3.ext.unit with type arguments of type AsyncResult
    Modifier and Type | Method | Description
    --- | --- | ---
    `void` | Async.`handler​(Handler<AsyncResult<Void>> completionHandler)` | Completion handler to receive a completion signal when this completions completes.
    `void` | Completion.`handler​(Handler<AsyncResult<T>> completionHandler)` | Completion handler to receive a completion signal when this completions completes.
    `void` | TestCompletion.`handler​(Handler<AsyncResult<Void>> completionHandler)` | Completion handler to receive a completion signal when this completions completes.

  - ### Uses of AsyncResult in io.vertx.rxjava3.ext.web

    Method parameters in io.vertx.rxjava3.ext.web with type arguments of type AsyncResult
    Modifier and Type | Method | Description
    --- | --- | ---
    `int` | RoutingContext.`addEndHandler​(Handler<AsyncResult<Void>> handler)` | Add an end handler for the request/response context.

  - ### Uses of AsyncResult in io.vertx.rxjava3.ext.web.handler.graphql.ws

    Methods in io.vertx.rxjava3.ext.web.handler.graphql.ws with parameters of type AsyncResult
    Modifier and Type | Method | Description
    --- | --- | ---
    `void` | ConnectionInitEvent.`handle​(AsyncResult<Object> asyncResult)` | Succeed or fail this promise with the event.

  - ### Uses of AsyncResult in io.vertx.rxjava3.ext.web.handler.sockjs

    Methods in io.vertx.rxjava3.ext.web.handler.sockjs with parameters of type AsyncResult
    Modifier and Type | Method | Description
    --- | --- | ---
    `void` | BridgeEvent.`handle​(AsyncResult<Boolean> asyncResult)` | Succeed or fail this promise with the event.

  - ### Uses of AsyncResult in io.vertx.servicediscovery.backend.redis

    Method parameters in io.vertx.servicediscovery.backend.redis with type arguments of type AsyncResult
    Modifier and Type | Method | Description
    --- | --- | ---
    `void` | RedisBackendService.`getRecord​(String uuid, Handler<AsyncResult<Record>> resultHandler)` |
    `void` | RedisBackendService.`getRecords​(Handler<AsyncResult<List<Record>>> resultHandler)` |
    `void` | RedisBackendService.`remove​(Record record, Handler<AsyncResult<Record>> resultHandler)` |
    `void` | RedisBackendService.`remove​(String uuid, Handler<AsyncResult<Record>> resultHandler)` |
    `void` | RedisBackendService.`store​(Record record, Handler<AsyncResult<Record>> resultHandler)` |
    `void` | RedisBackendService.`update​(Record record, Handler<AsyncResult<Void>> resultHandler)` |

  - ### Uses of AsyncResult in io.vertx.servicediscovery.spi

    Method parameters in io.vertx.servicediscovery.spi with type arguments of type AsyncResult
    Modifier and Type | Method | Description
    --- | --- | ---
    `void` | ServiceDiscoveryBackend.`getRecord​(String uuid, Handler<AsyncResult<Record>> resultHandler)` | Get the record with the given uuid.
    `void` | ServiceDiscoveryBackend.`getRecords​(Handler<AsyncResult<List<Record>>> resultHandler)` | Gets all the records
    `void` | ServiceDiscoveryBackend.`remove​(Record record, Handler<AsyncResult<Record>> resultHandler)` | Removes a record.
    `void` | ServiceDiscoveryBackend.`remove​(String uuid, Handler<AsyncResult<Record>> resultHandler)` | Removes a records based on its UUID.
    `void` | ServiceDiscoveryBackend.`store​(Record record, Handler<AsyncResult<Record>> resultHandler)` | Stores a record.
    `void` | ServiceDiscoveryBackend.`update​(Record record, Handler<AsyncResult<Void>> resultHandler)` | Updates a record

  - ### Uses of AsyncResult in io.vertx.serviceproxy

    Methods in io.vertx.serviceproxy that return types with arguments of type AsyncResult
    Modifier and Type | Method | Description
    --- | --- | ---
    `static <T> Handler<AsyncResult<T>>` | HelperUtils.`createHandler​(Message msg, boolean includeDebugInfo)` |
    `static Handler<AsyncResult<List<Character>>>` | HelperUtils.`createListCharHandler​(Message msg, boolean includeDebugInfo)` |
    `static <T> Handler<AsyncResult<List<T>>>` | HelperUtils.`createListHandler​(Message msg, boolean includeDebugInfo)` |
    `static Handler<AsyncResult<Map<String,​Character>>>` | HelperUtils.`createMapCharHandler​(Message msg, boolean includeDebugInfo)` |
    `static <T> Handler<AsyncResult<Map<String,​T>>>` | HelperUtils.`createMapHandler​(Message msg, boolean includeDebugInfo)` |
    `static Handler<AsyncResult<Set<Character>>>` | HelperUtils.`createSetCharHandler​(Message msg, boolean includeDebugInfo)` |
    `static <T> Handler<AsyncResult<Set<T>>>` | HelperUtils.`createSetHandler​(Message msg, boolean includeDebugInfo)` |