code: def build_body(cls: Type[AN], body: List[ast.stmt]) -> List:
          
          act_nodes = []  # type: List[ActNode]
          for child_node in body:
              act_nodes += ActNode.build(child_node)
          return act_nodes
docs: Note:
              Return type is probably ``-> List[AN]``, but can't get it to pass.