gistfile1.txt

        @composite_solid
        def upstream_composite_returning_nothing() -> Nothing:
            pass

        @solid
        def upstream_returning_string() -> str:
            return "something else"


        @solid(
            input_defs=[InputDefinition("start", Nothing),
                        InputDefinition("bar", String)]
        )
        def downstream_consuming_string(bar: str):
            pass


        @composite_solid(
            input_defs=[InputDefinition("bar", String),
                        InputDefinition("start", Nothing)]
        )
        def downstream_composite(bar: str, start: Nothing):
            downstream_consuming_string(bar, start=start)


        @pipeline
        def nothing_dependency_pipeline():
            real_string = upstream_returning_string()
            downstream_composite(real_string, start=upstream_composite_returning_nothing())

        execute_pipeline(nothing_dependency_pipeline)