Optional[x]
x | None
Union[x, y]
x | y
Signed-off-by: Harry Mellor <19981378+hmellor@users.noreply.github.com>
Signed-off-by: wang.yuqi <noooop@126.com> Co-authored-by: Harry Mellor <19981378+hmellor@users.noreply.github.com>