class_docstr: A Lexer that follows include statements.
  
  The OpenType feature file specification states that due to
  historical reasons, relative imports should be resolved in this
  order:
  
  1. If the source font is UFO format, then relative to the UFO's
     font directory
  2. relative to the top-level include file
  3. relative to the parent include file
  
  We only support 1 (via includeDir) and 2.
class_docstr_tok: ["A","Lexer","that","follows","include","statements",".","The","OpenType","feature","file","specification","states","that","due","to","historical","reasons",",","relative","imports","should","be","resolved","in","this","order",":","1",".","If","the","source","font","is","UFO","format",",","then","relative","to","the","UFO's","font","directory","2.","relative","to","the","top-level","include","file","3.","relative","to","the","parent","include","file","We","only","support","1","(","via","includeDir",")","and","2","."]
code: def scan_anonymous_block(self, tag):
      return self.lexers_[-1].scan_anonymous_block(tag)
  
imports: from fontTools.feaLib.error import FeatureLibError, IncludedFeaNotFound
  from fontTools.feaLib.location import FeatureLibLocation
  import re
  import os
label_desc: Use image node_id 6 for calling the IncludingLexer obj's underlying member method code with example usage: obj.scan_anonymous_block(tag) and returns: self