code: def add_child(self, child_type, *args, **kwargs):
          
          try:
              baseplate = kwargs['baseplate']
          except:
              if self.baseplate is None:
                  baseplate = self.actor_ref
              else:
                  baseplate = self.baseplate
          try:
              lock = kwargs['lock']
          except:
              lock = self.lock
          child = child_type.start(baseplate, lock, *args, **kwargs)
          self.children.append(child)
docs: Initialize and keep track of a child.
  
          :param child_type: a class inheriting from Lego to initialize \
                             an instance of
          :param args: arguments for initializing the child
          :param kwargs: keyword arguments for initializing the child
          :return: