question: enqueue the reference object on the receiver . concode_field_sep Reference<? extends T> head concode_elem_sep int NANOS_PER_MILLI concode_elem_sep Reference<?> unenqueued concode_field_sep void add concode_elem_sep Reference<? extends T> poll concode_elem_sep Reference<? extends T> remove concode_elem_sep Reference<? extends T> remove
target: void function ( Reference < ? extends T > arg0 ) { if ( head == null ) { arg0 . queueNext = arg0 ; } else { arg0 . queueNext = head ; } head = arg0 ; arg0 . strengthenReferent ( ) ; notify ( ) ; }