code: def test_circular():
      """The test file contains circular bookmarks."""
      doc = fitz.open(circular)
      toc = doc.get_toc(False)
  
file_path: pymudf/tests/test_toc.py
imports: import os
  import sys
  import fitz
label_desc: Use image node_id 6 for calling a global function with example usage: test_circular() without return types