code: def skip_bom(f):
      """
      Read past a BOM at the beginning of a source file.
      This could be added to the scanner, but it's *substantially* easier
      to keep it at this level.
      """
      if f.read(1) != "\uFEFF":
          f.seek(0)
  
imports: from __future__ import absolute_import
  import os
  import sys
  import re
  import io
  import codecs
  import shutil
  import tempfile
  from contextlib import contextmanager
label_desc: Use image node_id 16 for calling a global function with example usage: skip_bom(f) without return types