Return an iterator providing non-modifiable access to the first value_type object in the sequence of all the value elements of this unordered multiset equivalent to the specified key, if such entries exist, and the past-the-end (end) iterator otherwise. The behavior is undefined unless key is equivalent to the elements of at most one equivalent-key group in this unordered multiset.
Declared in <bslstl_unorderedmultiset.h>
template<class LOOKUP_KEY>
const_iterator
find(LOOKUP_KEY const& key) const
requires BloombergLP::bslmf::IsTransparentPredicate<HASH, LOOKUP_KEY>::value
&& BloombergLP::bslmf::IsTransparentPredicate<EQUAL,LOOKUP_KEY>::value;