syntax = "proto2";

package a;

message One {
  option no_standard_descriptor_accessor = false;
  extensions 4 to max;
}

message Two {
  extensions 4 to max;
}

message Three {
  message Four {
    message Five {
      option no_standard_descriptor_accessor = false;
      extensions 4 to max;
    }
    message Six {}
  }
  message Seven {
    option no_standard_descriptor_accessor = false;
    extensions 4 to max;
  }
  message Eight {}
  extensions 4 to max;
}

message Nine {
  extensions 4 to max;
}
