removeFieldByIndex method
remove all prefix key by index
this method will dispose all FocusNode
should call by next tick
Implementation
void removeFieldByIndex(int index) {
_list.removeWhere((key, value) {
List<String> _keyRaw = key.split('.');
if (_keyRaw.length > 1) {
value.dispose();
return _keyRaw.first == index.toString();
}
return false;
});
}