docs: def convert_type_list_elements(
      list_object  = None,
      element_type = str
      ):
      """
      Recursively convert all elements and all elements of all sublists of a list
      to a specified type and return the new list.
      """
      if element_type is str:
          return [str(element) if not isinstance(element, list) else convert_type_list_elements(
              list_object  = element,
              element_type = str
          ) for element in list_object]