Delete selected keys from Dart Map

Simply do:

_objTable.removeWhere((key, value) => key == "propertyName");

It works with nested Maps too.

You can do something like this :

_objTable.keys
  .where((k) => _objTable[k].indices.isEmpty) // filter keys
  .toList() // create a copy to avoid concurrent modifications
  .forEach(_objTable.remove); // remove selected keys