private TextRange narrowToMaxExtensionLines(@NotNull TextRange original, @NotNull TextRange result) {
    int startLine = Math.max(myDocument.getLineNumber(result.getStartOffset()),
                             myDocument.getLineNumber(original.getStartOffset()) - MAX_EXTENSION_LINES);
    int endLine = Math.min(myDocument.getLineNumber(result.getEndOffset() - 1),
                           myDocument.getLineNumber(original.getEndOffset() - 1) + MAX_EXTENSION_LINES);
    int rangeStart = Math.max(result.getStartOffset(), myDocument.getLineStartOffset(startLine));
    int rangeEnd = Math.min(result.getEndOffset(), myDocument.getLineEndOffset(endLine));
    return new TextRange(rangeStart, rangeEnd);
  }
private TextRange narrowToMaxExtensionLines(@NotNull TextRange original, @NotNull TextRange result)