@property
    def n_groups(self):
        return len(self._landmark_groups)
Clean and validate all form fields.
dataset/ETHPy150Open menpo/menpo/menpo/landmark/base.py/LandmarkManager.n_groups--crossover with--dataset/ETHPy150Open reviewboard/reviewboard/reviewboard/admin/forms.py/StorageSettingsForm.full_clean