[#bsl-multiset-03-contains-02]
= xref:bsl.adoc[bsl]::xref:bsl/multiset-03.adoc[multiset]::contains
:relfileprefix: ../../
:mrdocs:

Return whether this multiset contains an element equivalent to `key`.

== Synopsis

Declared in `<bslstl_multiset.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<class LOOKUP_KEY>
bool
contains(LOOKUP_KEY const& key) const
requires BloombergLP::bslmf::IsTransparentPredicate<COMPARATOR,
                                                   LOOKUP_KEY>::value;
----

== Description

Return `true` if this map contains an element whose key is equivalent to the specified `key`.

Note: implemented inline due to Sun CC compilation error

== Return Value

`true` if an equivalent key is present, and `false` otherwise

== Parameters

[cols="1,4"]
|===
| Name| Description
| *key*
| transparent key value to look up
|===


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