public Builder mergeFrom(main.Messages.TableRow other) {
        if (other == main.Messages.TableRow.getDefaultInstance()) return this;
        if (!other.cells_.isEmpty()) {
          if (cells_.isEmpty()) {
            cells_ = other.cells_;
            bitField0_ = (bitField0_ & ~0x00000001);
          } else {
            ensureCellsIsMutable();
            cells_.addAll(other.cells_);
          }
          onChanged();
        }
        this.mergeUnknownFields(other.getUnknownFields());
        return this;
      }