def check(self, **kwargs):
        """
        In addition to parent class' checks, also ensure that MULTITENANT_STATICFILES_DIRS
        is a tuple or a list.
        """
        errors = super().check(**kwargs)
        multitenant_staticfiles_dirs = settings.MULTITENANT_STATICFILES_DIRS

        if not isinstance(multitenant_staticfiles_dirs, (list, tuple)):
            errors.append(
                Error(
                    "Your MULTITENANT_STATICFILES_DIRS setting is not a tuple or list.",
                    hint="Perhaps you forgot a trailing comma?",
                )
            )

        return errors
In addition to parent class' checks, also ensure that MULTITENANT_STATICFILES_DIRS
        is a tuple or a list.