This class represents a MultiMap of String keys to a List of String values.

It's useful in Vert.x to represent things in Vert.x like HTTP headers and HTTP parameters which allow multiple values for keys.

- `Anything`
  - `Object`
    - `Basic` ...and other supertypes
      - `MultiMap`

- `MultiMap`
  - `Basic`
    - `Identifiable`
    - `Object`
      - `Anything`

no subtypes hierarchy

Initializer
`MultiMap(MultiMap unknown)`

Inherited Attributes
Attributes inherited from: `Object` `hash`, `string`

Methods
`add` | `shared default MultiMap add(String name, String value)` Adds a new value with the specified name and value. Parameters: `name` The name `value` The value being added
`addAll` | `shared default MultiMap addAll(MultiMap map)` Adds all the entries from another MultiMap to this one
`clear` | `shared default MultiMap clear()` Removes all
`contains` | `shared default Boolean contains(String name)` Checks to see if there is a value with the specified name Parameters: `name` The name to search for
`get` | `shared default String? get(String name)` Returns the value of with the specified name. If there are more than one values for the specified name, the first value is returned. Parameters: `name` The name of the header to search
`getAll` | `shared default List<String> getAll(String name)` Returns the values with the specified name Parameters: `name` The name to search
`isEmpty` | `shared default Boolean isEmpty()` Return true if empty
`names` | `shared default Set<String> names()` Gets a immutable `Set` of all names
`remove` | `shared default MultiMap remove(String name)` Removes the value with the given name Parameters: `name` The name of the value to remove
`set` | `shared default MultiMap set(String name, String value)` Sets a value under the specified name. If there is an existing header with the same name, it is removed. Parameters: `name` The name `value` The value
`setAll` | `shared default MultiMap setAll(MultiMap map)` Cleans this instance.
`size` | `shared default Integer size()` Return the number of keys.

Inherited Methods
Methods inherited from: `Object` `equals`