code: def get_labels(filename):
      content = (docs_path / filename).read_text()
      return set(label_re.findall(content))
  
file_path: datasette/tests/test_docs.py
imports: from datasette import app, utils
  from datasette.app import Datasette
  from datasette.filters import Filters
  from pathlib import Path
  import pytest
  import re
label_desc: Use image node_id 2 for calling a global function with example usage: get_labels(filename) and returns: set