def METHOD_NAME(self, proto, name):
    """Validates proto."""
    self.assertEqual(3, len(proto.value))
    self.assertEqual("%s_VERTEX" % name, proto.value[0].tag)
    self.assertEqual("%s_FACE" % name, proto.value[1].tag)
    self.assertEqual("%s_COLOR" % name, proto.value[2].tag)
    self.assertEqual(14, self.get_components(proto.value[0]))
    self.assertEqual(14, self.get_components(proto.value[1]))
    self.assertEqual(14, self.get_components(proto.value[2]))