docs: public java.lang.String getCharactersToSkip() {
      java.lang.Object ref = "";
      if (charactersCase_ == 1) {
        ref = characters_;
      }
      if (ref instanceof java.lang.String) {
        return (java.lang.String) ref;
      } else {
        com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
        java.lang.String s = bs.toStringUtf8();
        if (charactersCase_ == 1) {
          characters_ = s;
        }
        return s;
      }
    }