Return the address of a link whose key has the same value as the specified key (according to this hash-table's comparator), and a null pointer value if no such link exists. If this hash-table contains more than one element having the supplied key, return the first such element (from the contiguous sequence of elements having the same key).
Declared in <bslstl_hashtable.h>
bslalg::BidirectionalLink*
find(KeyType const& key) const;