import abc
from typing import Callable, Optional

# optional callable with an argument define
class OptCallArgs(abc.ABC):
    check: Optional[Callable[[int], None]]

# assignment of a callable is fine
class One(OptCallArgs):
    check = lambda value: None

# "def" of a suitable callable is not handled
class Two(OptCallArgs):
    @staticmethod
    def check(value: int): ...

class Three(OptCallArgs):
    def check(self, value: int): ...

# callable with args has no issue
class CallArgs(abc.ABC):
    check: Callable[[int], None]

class Four(CallArgs):
    def check(self, value: int): ...

# optional callable does not have an issue if there are no args
class OptCall(abc.ABC):
    check: Optional[Callable]

class Five(OptCall):
    def check(self): ...