code: def unregistercls(self, schemacls=None, data_types=None):
      
      return _REGISTRY.unregistercls(schemacls=schemacls, data_types=data_types)
docs: Unregister schema class or associated data_types.
  
      :param type schemacls: sub class of Schema.
      :param list data_types: data_types to unregister.