def METHOD_NAME(self, data):
    mutation = self.context["mutation"]
    info = self.context["info"]
    if self.validation_classes is None:
        raise ImproperlyConfigured(
            "check that app `caluma.caluma_core` is part of your `INSTALLED_APPS` "
            "or custom mutation has `validation_classes` properly assigned."
        )
    for validation_class in self.validation_classes:
        data = validation_class().METHOD_NAME(mutation, data, info)
    return data