code: def isHex(text):
      return _ishexRE.match(text) is not None
  
imports: import fontTools
  from fontTools.misc import eexec
  from fontTools.misc.macCreatorType import getMacCreatorAndType
  from fontTools.misc.textTools import bytechr, byteord, bytesjoin, tobytes
  from fontTools.misc.psOperators import _type1_pre_eexec_order, _type1_fontinfo_order, _type1_post_eexec_order
  from fontTools.encodings.StandardEncoding import StandardEncoding
  import os
  import re
label_desc: Use image node_id 9 for calling a global function with example usage: isHex(text) and returns: unknown