@task
def t1(a: int) -> typing.NamedTuple('OutputsBC', t1_int_output=int, c=str):
    return ((a + 2), 'world')
@task
def t1(a: int) -> typing.NamedTuple('OutputsBC', t1_int_output=int, c=str):
    return ((a + 2), 'world')