code: def __iter__(self):
      return self
  
imports: from fontTools.feaLib.error import FeatureLibError, IncludedFeaNotFound
  from fontTools.feaLib.location import FeatureLibLocation
  import re
  import os
label_desc: Use image node_id 2 for calling the Lexer obj's underlying member method code with example usage: obj.__iter__() and returns: self