question: this method is not supported and throws a runtimeexception concode_field_sep CSet s_instance concode_elem_sep int si concode_elem_sep int index concode_elem_sep CSet set concode_elem_sep Logger LOG concode_field_sep String next concode_elem_sep boolean c_contains concode_elem_sep void delete concode_elem_sep boolean remove concode_elem_sep void remove concode_elem_sep boolean removeAll concode_elem_sep boolean c_isEmpty concode_elem_sep Object[] toArray concode_elem_sep Object[] toArray concode_elem_sep int c_iterInit concode_elem_sep int newSet concode_elem_sep boolean c_add concode_elem_sep boolean add concode_elem_sep boolean containsAll concode_elem_sep void clear concode_elem_sep boolean isEmpty concode_elem_sep boolean hasNext concode_elem_sep boolean c_iterHasNext concode_elem_sep void deleteCSet concode_elem_sep boolean c_remove concode_elem_sep boolean contains concode_elem_sep int size concode_elem_sep boolean addAll concode_elem_sep String c_iterNext concode_elem_sep void finalize concode_elem_sep void c_clear concode_elem_sep int c_size concode_elem_sep boolean retainAll
target: Iterator < String > function ( ) { return new CSetIterator ( si , this ) ; }