Method validate

traitlets/traitlets.py:4012–4016

(self, obj: t.Any, value: t.Any)

        raise TraitError(e)

    def validate(self, obj: t.Any, value: t.Any) -> dict[K, V] | None:
        value = super().validate(obj, value)
        if value is None:
            return value
        return self.validate_elements(obj, value)

    def validate_elements(self, obj: t.Any, value: dict[t.Any, t.Any]) -> dict[K, V] | None:
        per_key_override = self._per_key_traits or {}