code: public void startBranch(TextBuffer tb, int startOffset,
                              boolean convertLFs)
      {
          mBranchBuffer = tb;
          mBranchStartOffset = startOffset;
          mConvertLFs = convertLFs;
          mGotCR = false;
      }
docs: /*
  ////////////////////////////////////////////////
  Branching methods; used mostly to make a copy
  of parsed internal subsets.
  ////////////////////////////////////////////////