private static TextChunk createNumberChunk(@NotNull PsiElement start, @NotNull PsiElement end) {
    Document document = PsiDocumentManager.getInstance(start.getProject()).getDocument(start.getContainingFile());
    if (document != null) {
      int startLine = getLineNumber(document, start.getTextRange().getStartOffset()) + 1;
      int endLine = getLineNumber(document, end.getTextRange().getEndOffset()) + 1;
      String lineText = startLine == endLine ? Integer.toString(startLine) : startLine + ".." + endLine;
      return new TextChunk(UsageTreeColors.NUMBER_OF_USAGES_ATTRIBUTES.toTextAttributes(), lineText + "  ");
    }
    return null;
  }
private static TextChunk createNumberChunk(@NotNull PsiElement start, @NotNull PsiElement end)