return the index of the given object . return -1 if the object is not in the set . concode_field_sep Comparator _comparator concode_elem_sep LinkedList _set concode_field_sep void removeAllLessThan concode_elem_sep Comparator getComparator concode_elem_sep void clear concode_elem_sep boolean isEmpty concode_elem_sep void insert concode_elem_sep Object take concode_elem_sep boolean contains concode_elem_sep Object at concode_elem_sep int size concode_elem_sep Enumeration elements concode_elem_sep Object removeFirst concode_elem_sep Object removeAt concode_elem_sep String toString concode_elem_sep List elementList concode_elem_sep Object first
int function ( Object arg0 ) { return _set . indexOf ( arg0 ) ; }