edition = "2023";

package a;

message One3 {
  One3 normal = 1;
  One3 delimited = 2 [features.message_encoding=DELIMITED];
  One3 normal_b = 3;
  One3 delimited_b = 4 [features.message_encoding=DELIMITED];

  extensions 100 to 1000;
}

extend One3 {
  string one3_str = 100;
  One3 one3_msg = 101;
  uint32 one3_uint32 = 102;
}