syntax = "proto2"; option java_outer_classname = "Extensions"; option java_package = "com.google.protobuf.nano.testext"; message ExtendableMessage { optional int32 field = 1; extensions 10 to max; } enum AnEnum { FIRST_VALUE = 1; SECOND_VALUE = 2; } message AnotherMessage { optional string string = 1; optional bool value = 2; } message ContainerMessage { extend ExtendableMessage { optional bool another_thing = 100; } } // For testNanoOptionalGroupWithUnknownFieldsEnabled; // not part of the extensions tests. message MessageWithGroup { optional group Group = 1 { optional int32 a = 2; } }