docs: def add_from_lists(self, data_list=None, fun_list=None, dsp_list=None):
          """
          Add multiple function and data nodes to dispatcher.
  
          :param data_list:
              It is a list of data node kwargs to be loaded.
          :type data_list: list[dict], optional
  
          :param fun_list:
              It is a list of function node kwargs to be loaded.
          :type fun_list: list[dict], optional
  
          :param dsp_list:
              It is a list of sub-dispatcher node kwargs to be loaded.
          :type dsp_list: list[dict], optional
  
          :returns:
  
              - Data node ids.
              - Function node ids.
              - Sub-dispatcher node ids.
          :rtype: (list[str], list[str], list[str])
  
          .. seealso:: :func:`add_data`, :func:`add_func`, :func:`add_function`,
             :func:`add_dispatcher`
  
          **--------------------------------------------------------------------**
  
          **Example**:
  
          .. testsetup::
              >>> dsp = Dispatcher(name='Dispatcher')
  
          Define a data list::
  
              >>> data_list = [
              ...     {'data_id': 'a'},
              ...     {'data_id': 'b'},
              ...     {'data_id': 'c'},
              ... ]
  
          Define a functions list::
  
              >>> def func(a, b):
              ...     return a + b
              ...
              >>> fun_list = [
              ...     {'function': func, 'inputs': ['a', 'b'], 'outputs': ['c']}
              ... ]
  
          Define a sub-dispatchers list::
  
              >>> sub_dsp = Dispatcher(name='Sub-dispatcher')
              >>> sub_dsp.add_function(function=func, inputs=['e', 'f'],
              ...                      outputs=['g'])
              'func'
              >>>
              >>> dsp_list = [
              ...     {'dsp_id': 'Sub', 'dsp': sub_dsp,
              ...      'inputs': {'a': 'e', 'b': 'f'}, 'outputs': {'g': 'c'}},
              ... ]
  
          Add function and data nodes to dispatcher::
  
              >>> dsp.add_from_lists(data_list, fun_list, dsp_list)
              (['a', 'b', 'c'], ['func'], ['Sub'])
          """
  
          if data_list:  # Add data nodes.
              data_ids = [self.add_data(**v) for v in data_list]  # Data ids.
          else:
              data_ids = []
  
          if fun_list:  # Add function nodes.
              fun_ids = [self.add_function(**v) for v in fun_list]  # Func ids.
          else:
              fun_ids = []
  
          if dsp_list:  # Add dispatcher nodes.
              dsp_ids = [self.add_dispatcher(**v) for v in dsp_list]  # Dsp ids.
          else:
              dsp_ids = []
  
          # Return data, function, and sub-dispatcher node ids.
          return data_ids, fun_ids, dsp_ids