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

- Packages that use MultiMap
  Package | Description
  --- | ---
  io.vertx.core |
  io.vertx.core.eventbus |
  io.vertx.core.http |
  io.vertx.core.spi.observability |
  io.vertx.ext.auth.authorization |
  io.vertx.ext.mail |
  io.vertx.ext.mail.mailencoder |
  io.vertx.ext.web |
  io.vertx.ext.web.api |
  io.vertx.ext.web.api.service |
  io.vertx.ext.web.client |
  io.vertx.ext.web.handler.graphql |
  io.vertx.ext.web.handler.sockjs |
  io.vertx.grpc.client |
  io.vertx.grpc.common |
  io.vertx.grpc.server |
  io.vertx.httpproxy |
  io.vertx.mqtt |
  io.vertx.reactivex.core |
  io.vertx.rxjava.core |
  io.vertx.rxjava3.core |

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

    Methods in io.vertx.core that return MultiMap
    Modifier and Type | Method and Description
    --- | ---
    `MultiMap` | MultiMap.`add(CharSequence name, CharSequence value)` Like `add(String, String)` but accepting `CharSequence` as parameters
    `MultiMap` | MultiMap.`add(CharSequence name, Iterable<CharSequence> values)` Like `add(String, Iterable)` but accepting `CharSequence` as parameters
    `MultiMap` | MultiMap.`add(String name, Iterable<String> values)` Adds a new values under the specified name
    `MultiMap` | MultiMap.`add(String name, String value)` Adds a new value with the specified name and value.
    `MultiMap` | MultiMap.`addAll(Map<String,String> headers)` Adds all the entries from a Map to this
    `MultiMap` | MultiMap.`addAll(MultiMap map)` Adds all the entries from another MultiMap to this one
    `static MultiMap` | MultiMap.`caseInsensitiveMultiMap()` Create a multi-map implementation with case insensitive keys, for instance it can be used to hold some HTTP headers.
    `MultiMap` | MultiMap.`clear()` Removes all
    `MultiMap` | MultiMap.`remove(CharSequence name)` Like `remove(String)` but accepting `CharSequence` as parameters
    `MultiMap` | MultiMap.`remove(String name)` Removes the value with the given name
    `MultiMap` | MultiMap.`set(CharSequence name, CharSequence value)` Like `set(String, String)` but accepting `CharSequence` as parameters
    `MultiMap` | MultiMap.`set(CharSequence name, Iterable<CharSequence> values)` Like `set(String, Iterable)` but accepting `CharSequence` as parameters
    `MultiMap` | MultiMap.`set(String name, Iterable<String> values)` Sets values for the specified name.
    `MultiMap` | MultiMap.`set(String name, String value)` Sets a `value` under the specified `name`.
    `MultiMap` | MultiMap.`setAll(Map<String,String> headers)` Cleans and set all values of the given instance
    `MultiMap` | MultiMap.`setAll(MultiMap map)` Cleans this instance.

    Methods in io.vertx.core with parameters of type MultiMap
    Modifier and Type | Method and Description
    --- | ---
    `MultiMap` | MultiMap.`addAll(MultiMap map)` Adds all the entries from another MultiMap to this one
    `MultiMap` | MultiMap.`setAll(MultiMap map)` Cleans this instance.

  - ### Uses of MultiMap in io.vertx.core.eventbus

    Methods in io.vertx.core.eventbus that return MultiMap
    Modifier and Type | Method and Description
    --- | ---
    `MultiMap` | DeliveryOptions.`getHeaders()` Get the message headers
    `MultiMap` | Message.`headers()` Multi-map of message headers.

    Methods in io.vertx.core.eventbus with parameters of type MultiMap
    Modifier and Type | Method and Description
    --- | ---
    `DeliveryOptions` | DeliveryOptions.`setHeaders(MultiMap headers)` Set message headers from a multi-map.

  - ### Uses of MultiMap in io.vertx.core.http

    Methods in io.vertx.core.http that return MultiMap
    Modifier and Type | Method and Description
    --- | ---
    `MultiMap` | HttpServerRequest.`formAttributes()` Returns a map of all form attributes in the request.
    `MultiMap` | UpgradeRejectedException.`getHeaders()`
    `MultiMap` | RequestOptions.`getHeaders()` Get the request headers
    `MultiMap` | HttpClientResponse.`headers()`
    `MultiMap` | HttpServerResponse.`headers()`
    `static MultiMap` | HttpHeaders.`headers()`
    `MultiMap` | HttpClientRequest.`headers()`
    `MultiMap` | HttpServerRequest.`headers()`
    `MultiMap` | WebSocketBase.`headers()` Returns the HTTP headers when the WebSocket is first obtained in the handler.
    `MultiMap` | HttpServerRequest.`params()`
    `static MultiMap` | HttpHeaders.`set(CharSequence name, CharSequence value)`
    `static MultiMap` | HttpHeaders.`set(String name, String value)`
    `MultiMap` | HttpClientResponse.`trailers()`
    `MultiMap` | HttpServerResponse.`trailers()`

    Methods in io.vertx.core.http with parameters of type MultiMap
    Modifier and Type | Method and Description
    --- | ---
    `Future<HttpServerResponse>` | HttpServerResponse.`push(HttpMethod method, HostAndPort authority, String path, MultiMap headers)` Same as `HttpServerResponse.push(HttpMethod, String, String, MultiMap, Handler)` but with an `handler` called when the operation completes
    `default Future<HttpServerResponse>` | HttpServerResponse.`push(HttpMethod method, String path, MultiMap headers)` Same as `HttpServerResponse.push(HttpMethod, String, MultiMap, Handler)` but with an `handler` called when the operation completes
    `default HttpServerResponse` | HttpServerResponse.`push(HttpMethod method, String path, MultiMap headers, Handler<AsyncResult<HttpServerResponse>> handler)` Like `HttpServerResponse.push(HttpMethod, String, String, MultiMap, Handler)` with the host copied from the current request.
    `Future<HttpServerResponse>` | HttpServerResponse.`push(HttpMethod method, String host, String path, MultiMap headers)` Deprecated. instead use `HttpServerResponse.push(HttpMethod, HostAndPort, String, MultiMap)`
    `default HttpServerResponse` | HttpServerResponse.`push(HttpMethod method, String host, String path, MultiMap headers, Handler<AsyncResult<HttpServerResponse>> handler)` Push a response to the client. The `handler` will be notified with a success when the push can be sent and with a failure when the client has disabled push or reset the push before it has been sent. The `handler` may be queued if the client has reduced the maximum number of streams the server can push concurrently. Push can be sent only for peer initiated streams and if the response is not ended.
    `WebSocketConnectOptions` | WebSocketConnectOptions.`setHeaders(MultiMap headers)`
    `RequestOptions` | RequestOptions.`setHeaders(MultiMap headers)` Set request headers from a multi-map.
    `Future<WebSocket>` | HttpClient.`webSocketAbs(String url, MultiMap headers, WebsocketVersion version, List<String> subProtocols)` Deprecated. instead use `WebSocketClient.connect(WebSocketConnectOptions)`
    `void` | HttpClient.`webSocketAbs(String url, MultiMap headers, WebsocketVersion version, List<String> subProtocols, Handler<AsyncResult<WebSocket>> handler)` Deprecated. instead use `WebSocketClient.connect(WebSocketConnectOptions, Handler)`
    `Future<Void>` | HttpServerResponse.`writeEarlyHints(MultiMap headers)` Used to write an interim 103 Early Hints response to return some HTTP headers before the final HTTP message.
    `void` | HttpServerResponse.`writeEarlyHints(MultiMap headers, Handler<AsyncResult<Void>> handler)` Same as `HttpServerResponse.writeEarlyHints(MultiMap)` but with an `handler` called when the operation completes

    Constructors in io.vertx.core.http with parameters of type MultiMap
    Constructor and Description
    `UpgradeRejectedException(String message, int status, MultiMap headers, Buffer content)`

  - ### Uses of MultiMap in io.vertx.core.spi.observability

    Methods in io.vertx.core.spi.observability that return MultiMap
    Modifier and Type | Method and Description
    --- | ---
    `MultiMap` | HttpRequest.`headers()`
    `MultiMap` | HttpResponse.`headers()`

  - ### Uses of MultiMap in io.vertx.ext.auth.authorization

    Methods in io.vertx.ext.auth.authorization that return MultiMap
    Modifier and Type | Method and Description
    --- | ---
    `MultiMap` | AuthorizationContext.`variables()`

  - ### Uses of MultiMap in io.vertx.ext.mail

    Methods in io.vertx.ext.mail that return MultiMap
    Modifier and Type | Method and Description
    --- | ---
    `MultiMap` | MailAttachment.`getHeaders()` Get the headers to be added for this attachment.
    `MultiMap` | MailMessage.`getHeaders()` Get the headers.

    Methods in io.vertx.ext.mail with parameters of type MultiMap
    Modifier and Type | Method and Description
    --- | ---
    `MailAttachment` | MailAttachment.`setHeaders(MultiMap headers)` Set the headers to be added for this attachment.
    `MailMessage` | MailMessage.`setHeaders(MultiMap headers)` Set the headers.

  - ### Uses of MultiMap in io.vertx.ext.mail.mailencoder

    Methods in io.vertx.ext.mail.mailencoder that return MultiMap
    Modifier and Type | Method and Description
    --- | ---
    `MultiMap` | EncodedPart.`headers()`

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

    Methods in io.vertx.ext.web that return MultiMap
    Modifier and Type | Method and Description
    --- | ---
    `MultiMap` | RoutingContext.`queryParams()` Returns a map of all query parameters inside the query string The query parameters are lazily decoded: the decoding happens on the first time this method is called.
    `MultiMap` | RoutingContext.`queryParams(Charset encoding)` Always decode the current query string with the given `encoding`.

  - ### Uses of MultiMap in io.vertx.ext.web.api

    Methods in io.vertx.ext.web.api that return MultiMap
    Modifier and Type | Method and Description
    --- | ---
    `MultiMap` | OperationRequest.`getHeaders()` Deprecated. Get request headers
    `MultiMap` | OperationResponse.`getHeaders()` Deprecated.

    Methods in io.vertx.ext.web.api with parameters of type MultiMap
    Modifier and Type | Method and Description
    --- | ---
    `OperationRequest` | OperationRequest.`setHeaders(MultiMap headers)` Deprecated.
    `OperationResponse` | OperationResponse.`setHeaders(MultiMap headers)` Deprecated.

    Constructors in io.vertx.ext.web.api with parameters of type MultiMap
    Constructor and Description
    `OperationRequest(JsonObject params, MultiMap headers, JsonObject user, JsonObject extra)` Deprecated.
    `OperationResponse(Integer statusCode, String statusMessage, Buffer payload, MultiMap headers)` Deprecated.

  - ### Uses of MultiMap in io.vertx.ext.web.api.service

    Methods in io.vertx.ext.web.api.service that return MultiMap
    Modifier and Type | Method and Description
    --- | ---
    `MultiMap` | ServiceResponse.`getHeaders()`
    `MultiMap` | ServiceRequest.`getHeaders()` Get request headers

    Methods in io.vertx.ext.web.api.service with parameters of type MultiMap
    Modifier and Type | Method and Description
    --- | ---
    `ServiceResponse` | ServiceResponse.`setHeaders(MultiMap headers)`
    `ServiceRequest` | ServiceRequest.`setHeaders(MultiMap headers)`

    Constructors in io.vertx.ext.web.api.service with parameters of type MultiMap
    Constructor and Description
    `ServiceRequest(JsonObject params, MultiMap headers, JsonObject user, JsonObject extra)`
    `ServiceResponse(Integer statusCode, String statusMessage, Buffer payload, MultiMap headers)`

  - ### Uses of MultiMap in io.vertx.ext.web.client

    Methods in io.vertx.ext.web.client that return MultiMap
    Modifier and Type | Method and Description
    --- | ---
    `MultiMap` | HttpRequest.`headers()`
    `MultiMap` | HttpResponse.`headers()`
    `MultiMap` | HttpRequest.`queryParams()` Return the current query parameters.
    `MultiMap` | HttpResponse.`trailers()`

    Methods in io.vertx.ext.web.client with parameters of type MultiMap
    Modifier and Type | Method and Description
    --- | ---
    `HttpRequest<T>` | HttpRequest.`putHeaders(MultiMap headers)` Configure the request to add multiple HTTP headers .
    `default Future<HttpResponse<T>>` | HttpRequest.`sendForm(MultiMap body)`
    `void` | HttpRequest.`sendForm(MultiMap body, Handler<AsyncResult<HttpResponse<T>>> handler)` Like `HttpRequest.send(Handler)` but with an HTTP request `body` multimap encoded as form and the content type set to `application/x-www-form-urlencoded`.
    `default Future<HttpResponse<T>>` | HttpRequest.`sendForm(MultiMap body, String charset)`
    `void` | HttpRequest.`sendForm(MultiMap body, String charset, Handler<AsyncResult<HttpResponse<T>>> handler)` Like `HttpRequest.send(Handler)` but with an HTTP request `body` multimap encoded as form and the content type set to `application/x-www-form-urlencoded`.

  - ### Uses of MultiMap in io.vertx.ext.web.handler.graphql

    Method parameters in io.vertx.ext.web.handler.graphql with type arguments of type MultiMap
    Modifier and Type | Method and Description
    --- | ---
    `GraphiQLHandlerBuilder` | GraphiQLHandlerBuilder.`addingHeaders(java.util.function.Function<RoutingContext,MultiMap> factory)` Customize the HTTP headers to add to GraphQL requests sent by the GraphiQL user interface.
    `GraphiQLHandler` | GraphiQLHandler.`graphiQLRequestHeaders(java.util.function.Function<RoutingContext,MultiMap> factory)` Deprecated. as of 4.5.1, use `GraphiQLHandler.builder(Vertx)` instead

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

    Methods in io.vertx.ext.web.handler.sockjs that return MultiMap
    Modifier and Type | Method and Description
    --- | ---
    `MultiMap` | SockJSSocket.`headers()` Return the headers corresponding to the last request for this socket or the websocket handshake Any cookie headers will be removed for security reasons

  - ### Uses of MultiMap in io.vertx.grpc.client

    Methods in io.vertx.grpc.client that return MultiMap
    Modifier and Type | Method and Description
    --- | ---
    `MultiMap` | GrpcClientResponse.`trailers()`

  - ### Uses of MultiMap in io.vertx.grpc.common

    Methods in io.vertx.grpc.common that return MultiMap
    Modifier and Type | Method and Description
    --- | ---
    `MultiMap` | GrpcReadStream.`headers()`
    `MultiMap` | GrpcWriteStream.`headers()`

  - ### Uses of MultiMap in io.vertx.grpc.server

    Methods in io.vertx.grpc.server that return MultiMap
    Modifier and Type | Method and Description
    --- | ---
    `MultiMap` | GrpcServerResponse.`trailers()`

  - ### Uses of MultiMap in io.vertx.httpproxy

    Methods in io.vertx.httpproxy that return MultiMap
    Modifier and Type | Method and Description
    --- | ---
    `MultiMap` | ProxyRequest.`headers()`
    `MultiMap` | ProxyResponse.`headers()`

  - ### Uses of MultiMap in io.vertx.mqtt

    Methods in io.vertx.mqtt that return MultiMap
    Modifier and Type | Method and Description
    --- | ---
    `MultiMap` | MqttEndpoint.`httpHeaders()` Returns the HTTP headers sent by the client when a WebSocket transport is used otherwise `null`

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

    Methods in io.vertx.reactivex.core that return MultiMap
    Modifier and Type | Method and Description
    --- | ---
    `MultiMap` | MultiMap.`getDelegate()`

    Methods in io.vertx.reactivex.core with parameters of type MultiMap
    Modifier and Type | Method and Description
    --- | ---
    `static MultiMap` | MultiMap.`newInstance(MultiMap arg)`

    Constructors in io.vertx.reactivex.core with parameters of type MultiMap
    Constructor and Description
    `MultiMap(MultiMap delegate)`

  - ### Uses of MultiMap in io.vertx.rxjava.core

    Methods in io.vertx.rxjava.core that return MultiMap
    Modifier and Type | Method and Description
    --- | ---
    `MultiMap` | MultiMap.`getDelegate()`

    Methods in io.vertx.rxjava.core with parameters of type MultiMap
    Modifier and Type | Method and Description
    --- | ---
    `static MultiMap` | MultiMap.`newInstance(MultiMap arg)`

    Constructors in io.vertx.rxjava.core with parameters of type MultiMap
    Constructor and Description
    `MultiMap(MultiMap delegate)`

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

    Methods in io.vertx.rxjava3.core that return MultiMap
    Modifier and Type | Method and Description
    --- | ---
    `MultiMap` | MultiMap.`getDelegate()`

    Methods in io.vertx.rxjava3.core with parameters of type MultiMap
    Modifier and Type | Method and Description
    --- | ---
    `static MultiMap` | MultiMap.`newInstance(MultiMap arg)`

    Constructors in io.vertx.rxjava3.core with parameters of type MultiMap
    Constructor and Description
    `MultiMap(MultiMap delegate)`

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