protected void appendUsageNodeText(StringBuilder buf, UsageNode node) {
    TextChunk[] chunks = node.getUsage().getPresentation().getText();
    int chunkCount = 0;
    for (TextChunk chunk : chunks) {
      if (chunkCount == 1) buf.append(" "); // add space after line number
      buf.append(chunk.getText());
      ++chunkCount;
    }
  }
protected void appendUsageNodeText(StringBuilder buf, UsageNode node)