'return list of labels that are currently stored, but aren\'t
in user-provided list'

def get_extra_current_labels(self):

    extra_labels = []
    user_label_keys = self.get_user_keys()
    current_label_keys = self.get_current_label_keys()
    for current_key in current_label_keys:
        if (current_key not in user_label_keys):
            extra_labels.append(current_key)
    return extra_labels
