removeLast method
T?
removeLast()
删除最后一个的元素, 并发射
Implementation
T? removeLast() {
if (_subject.isClosed) {
L.w('IO在close状态下请求发送数据');
return null;
}
final T lastElement = latest!.last;
if (latest!.isNotEmpty) {
_subject.add(latest?..removeLast());
}
return lastElement;
}