copyFrom method
Implementation
void copyFrom(AbsExModel src, {String? newMid, String? pMid}) {
_mid = newMid ?? HycopUtils.genMid(type);
parentMid = UndoAble<String>(pMid ?? src.parentMid.value, mid, 'parentMid');
order = UndoAble<double>(src.order.value, mid, 'order');
hashTag = UndoAble<String>(src.hashTag.value, mid, 'hashTag');
isRemoved = UndoAble<bool>(src.isRemoved.value, mid, 'isRemoved');
_realTimeKey = src.realTimeKey;
autoSave = src.autoSave;
}