example of code for composition arrows?

[dz0]

Hi, I have composition of
SimpleHttpTask <>----> requests.Session

that is not displayed:

class SimpleHttpTask(Task):
    url = None
    method = "GET"
    client = requests.Session()

[dz0]

seems, like assign'ing inside init works (but not via class attribute -- which is now quite common (esp, with dataclass))