code: def loadData(self, file):
      file.seek(self.offset)
      data = file.read(self.length)
      assert len(data) == self.length
      if hasattr(self.__class__, "decodeData"):
          data = self.decodeData(data)
      return data
  
imports: from io import BytesIO
  from types import SimpleNamespace
  from fontTools.misc.textTools import Tag
  from fontTools.misc import sstruct
  from fontTools.ttLib import TTLibError, TTLibFileIsCollectionError
  import struct
  from collections import OrderedDict
  import logging
label_desc: Use image node_id 6 for calling the DirectoryEntry obj's underlying member method code with example usage: obj.loadData(file) and returns: data