docs: public static int computeObjectSizeNoTag(Object o) {
          int size = 0;
          if (o == null) {
              return size;
          }
  
          Class cls = o.getClass();
          Codec target = ProtobufProxy.create(cls);
          try {
              size = target.size(o);
              size = size + CodedOutputStream.computeRawVarint32Size(size);
              return size;
          } catch (IOException e) {
              throw new RuntimeException(e.getMessage(), e);
          }
      }