docs: public static boolean hasPlrselPart(List<SoyMsgPart> msgParts) {
      for (SoyMsgPart origMsgPart : msgParts) {
        if (origMsgPart instanceof SoyMsgPluralPart || origMsgPart instanceof SoyMsgSelectPart) {
          return true;
        }
      }
      return false;
    }