Method is_metaclass

mypy/nodes.py:4089–4094

(self, *, precise: bool = False)

        return None

    def is_metaclass(self, *, precise: bool = False) -> bool:
        return (
            self.has_base("builtins.type")
            or self.fullname == "abc.ABCMeta"
            or (self.fallback_to_any and not precise)
        )

    def has_base(self, fullname: str) -> bool:
        """Return True if type has a base type with the specified name.