dep-protobuf/upb/wire/encode_test.proto

syntax = "proto2";

package upb_wire_test;

option java_multiple_files = true;
option java_outer_classname = "ConvertTest";

message TestInt32 {
  optional int32 i32 = 1;
}

message TestRecursive {
  optional TestRecursive recursive = 1;
}

message TestExtensions {
  extensions 100 to max;
}

extend TestExtensions {
  optional int32 ext_i32 = 100;
  optional TestRecursive ext_recursive = 101;
}