1Recommended.Proto2.JsonInput.FieldNameExtension.Validator 2Required.Proto2.JsonInput.BoolFieldFalse.JsonOutput 3Required.Proto2.JsonInput.BoolFieldFalse.ProtobufOutput 4Required.Proto2.JsonInput.EnumField.JsonOutput 5Required.Proto2.JsonInput.EnumField.ProtobufOutput 6Required.Proto2.JsonInput.EnumFieldNumericValueZero.JsonOutput 7Required.Proto2.JsonInput.EnumFieldNumericValueZero.ProtobufOutput 8Required.Proto2.JsonInput.StoresDefaultPrimitive.Validator 9