question: returns an arbitrary object from the group . there is no guarantee as to which will be returned , and whether the same will be returned on the next call . concode_field_sep EquivalenceComparator<? super E,? super C> eqComparator concode_elem_sep Set<E> elementsSet concode_elem_sep C comparatorContext concode_field_sep void add concode_elem_sep int size concode_elem_sep boolean equivalentTo concode_elem_sep int hashCode concode_elem_sep boolean equals concode_elem_sep Object[] toArray concode_elem_sep String toString concode_elem_sep C getContext
target: E function ( ) { return elementsSet . iterator ( ) . next ( ) ; }