def METHOD_NAME(self) -> None:
    from django.core.exceptions import ValidationError
    if (
        sum(
            (
                bool(self.analyzer_config),
                bool(self.connector_config),
                bool(self.visualizer_config),
            )
        )
        != 1
    ):
        raise ValidationError(
            "You must have exactly one between"
            " `analyzer`, `connector` and `visualizer"
        )