## Uses of Interface
org.apache.commons.collections4.MultiSet

- Packages that use MultiSet
  Package | Description
  --- | ---
  org.apache.commons.collections4 | This package contains the interfaces and utilities shared across all the subpackages of this component.
  org.apache.commons.collections4.collection | This package contains implementations of the `Collection` interface.
  org.apache.commons.collections4.multimap | This package contains implementations of the `MultiValuedMap` interfaces.
  org.apache.commons.collections4.multiset | This package contains implementations of the `MultiSet` and `SortedMultiSet` interfaces.

- - ### Uses of MultiSet in org.apache.commons.collections4

    Fields in org.apache.commons.collections4 declared as MultiSet
    Modifier and Type | Field and Description
    --- | ---
    `static MultiSet` | MultiSetUtils.`EMPTY_MULTISET` An empty unmodifiable multiset.

    Methods in org.apache.commons.collections4 that return MultiSet
    Modifier and Type | Method and Description
    --- | ---
    `static <E> MultiSet<E>` | MultiSetUtils.`emptyMultiSet()` Get an empty `MultiSet`.
    `MultiSet<K>` | MultiValuedMap.`keys()` Returns a `MultiSet` view of the keys contained in this multi-valued map.
    `static <E> MultiSet<E>` | MultiSetUtils.`predicatedMultiSet(MultiSet<E> multiset, Predicate<? super E> predicate)` Returns a predicated (validating) multiset backed by the given multiset.
    `static <E> MultiSet<E>` | MultiSetUtils.`synchronizedMultiSet(MultiSet<E> multiset)` Returns a synchronized (thread-safe) multiset backed by the given multiset.
    `static <E> MultiSet<E>` | MultiSetUtils.`unmodifiableMultiSet(MultiSet<? extends E> multiset)` Returns an unmodifiable view of the given multiset.

    Methods in org.apache.commons.collections4 with parameters of type MultiSet
    Modifier and Type | Method and Description
    --- | ---
    `static <E> MultiSet<E>` | MultiSetUtils.`predicatedMultiSet(MultiSet<E> multiset, Predicate<? super E> predicate)` Returns a predicated (validating) multiset backed by the given multiset.
    `static <E> MultiSet<E>` | MultiSetUtils.`synchronizedMultiSet(MultiSet<E> multiset)` Returns a synchronized (thread-safe) multiset backed by the given multiset.
    `static <E> MultiSet<E>` | MultiSetUtils.`unmodifiableMultiSet(MultiSet<? extends E> multiset)` Returns an unmodifiable view of the given multiset.

  - ### Uses of MultiSet in org.apache.commons.collections4.collection

    Methods in org.apache.commons.collections4.collection that return MultiSet
    Modifier and Type | Method and Description
    --- | ---
    `MultiSet<E>` | PredicatedCollection.Builder.`createPredicatedMultiSet()` Create a new predicated multiset filled with the accepted elements.
    `MultiSet<E>` | PredicatedCollection.Builder.`createPredicatedMultiSet(MultiSet<E> multiset)` Decorates the given multiset with validating behavior using the predicate.

    Methods in org.apache.commons.collections4.collection with parameters of type MultiSet
    Modifier and Type | Method and Description
    --- | ---
    `MultiSet<E>` | PredicatedCollection.Builder.`createPredicatedMultiSet(MultiSet<E> multiset)` Decorates the given multiset with validating behavior using the predicate.

  - ### Uses of MultiSet in org.apache.commons.collections4.multimap

    Methods in org.apache.commons.collections4.multimap that return MultiSet
    Modifier and Type | Method and Description
    --- | ---
    `MultiSet<K>` | AbstractMultiValuedMap.`keys()` Returns a `MultiSet` view of the key mapping contained in this map.
    `MultiSet<K>` | AbstractMultiValuedMapDecorator.`keys()`
    `MultiSet<K>` | UnmodifiableMultiValuedMap.`keys()`

  - ### Uses of MultiSet in org.apache.commons.collections4.multiset

    Classes in org.apache.commons.collections4.multiset that implement MultiSet
    Modifier and Type | Class and Description
    --- | ---
    `class` | `AbstractMapMultiSet<E>` Abstract implementation of the `MultiSet` interface to simplify the creation of subclass implementations.
    `class` | `AbstractMultiSet<E>` Abstract implementation of the `MultiSet` interface to simplify the creation of subclass implementations.
    `class` | `AbstractMultiSetDecorator<E>` Decorates another `MultSet` to provide additional behaviour.
    `class` | `HashMultiSet<E>` Implements `MultiSet`, using a `HashMap` to provide the data storage.
    `class` | `PredicatedMultiSet<E>` Decorates another `MultiSet` to validate that additions match a specified predicate.
    `class` | `SynchronizedMultiSet<E>` Decorates another `MultiSet` to synchronize its behaviour for a multi-threaded environment.
    `class` | `UnmodifiableMultiSet<E>` Decorates another `MultiSet` to ensure it can't be altered.

    Methods in org.apache.commons.collections4.multiset that return MultiSet
    Modifier and Type | Method and Description
    --- | ---
    `protected MultiSet<E>` | PredicatedMultiSet.`decorated()` Gets the decorated multiset.
    `protected MultiSet<E>` | SynchronizedMultiSet.`decorated()` Gets the multiset being decorated.
    `protected MultiSet<E>` | AbstractMultiSetDecorator.`decorated()` Gets the multiset being decorated.
    `static <E> MultiSet<E>` | UnmodifiableMultiSet.`unmodifiableMultiSet(MultiSet<? extends E> multiset)` Factory method to create an unmodifiable multiset.

    Methods in org.apache.commons.collections4.multiset with parameters of type MultiSet
    Modifier and Type | Method and Description
    --- | ---
    `static <E> PredicatedMultiSet<E>` | PredicatedMultiSet.`predicatedMultiSet(MultiSet<E> multiset, Predicate<? super E> predicate)` Factory method to create a predicated (validating) multiset.
    `static <E> SynchronizedMultiSet<E>` | SynchronizedMultiSet.`synchronizedMultiSet(MultiSet<E> multiset)` Factory method to create a synchronized multiset.
    `static <E> MultiSet<E>` | UnmodifiableMultiSet.`unmodifiableMultiSet(MultiSet<? extends E> multiset)` Factory method to create an unmodifiable multiset.

    Constructors in org.apache.commons.collections4.multiset with parameters of type MultiSet
    Constructor and Description
    `AbstractMultiSetDecorator(MultiSet<E> multiset)` Constructor that wraps (not copies).
    `PredicatedMultiSet(MultiSet<E> multiset, Predicate<? super E> predicate)` Constructor that wraps (not copies).
    `SynchronizedMultiSet(MultiSet<E> multiset)` Constructor that wraps (not copies).
    `SynchronizedMultiSet(MultiSet<E> multiset, Object lock)` Constructor that wraps (not copies).

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