1Recommended.Proto3.ProtobufInput.GroupUnknownFields_Drop.TextFormatOutput 2Recommended.Proto3.ProtobufInput.MessageUnknownFields_Drop.TextFormatOutput 3Recommended.Proto3.ProtobufInput.RepeatedUnknownFields_Drop.TextFormatOutput 4Recommended.Proto3.ProtobufInput.ScalarUnknownFields_Drop.TextFormatOutput 5Required.Proto3.TextFormatInput.AnyField.ProtobufOutput 6Required.Proto3.TextFormatInput.AnyField.TextFormatOutput 7