returns true if the queue is empty , and false otherwise . concode_field_sep InternalJob dummy concode_elem_sep boolean allowPriorityOvertaking concode_elem_sep boolean allowConflictOvertaking concode_field_sep void enqueue concode_elem_sep Iterator iterator concode_elem_sep boolean canOvertake concode_elem_sep InternalJob dequeue concode_elem_sep void clear concode_elem_sep void resort concode_elem_sep void remove concode_elem_sep InternalJob peek
boolean function ( ) { return dummy . next ( ) == dummy ; }