@task
def t2(a: MyCustomType, b: str) -> (MyCustomType, int):
    return (MyCustomType(x=a.x, y=f'{a.y} {b}'), 5)
@task
def t2(a: MyCustomType, b: str) -> (MyCustomType, int):
    return (MyCustomType(x=a.x, y=f'{a.y} {b}'), 5)