code: def get_api_functions(tagname, api_dict):
      """Parse source files to get functions tagged by the given tag."""
      functions = []
      for f in API_FILES:
          functions.extend(find_functions(f, tagname))
      dfunctions = [
          (api_dict[func.name][0], func) for func in functions
      ]
      dfunctions.sort()
      return [a[1] for a in dfunctions]
  
imports: import hashlib
  import io
  import os
  import re
  import sys
  import importlib.util
  import textwrap
  from os.path import join
label_desc: Use image node_id 13 for calling a global function with example usage: get_api_functions(tagname, api_dict) and returns: unknown