code: def range(self, name):
      try:
          fileinfo = self._dir[name]
      except KeyError:
          raise NameError("Unknown file %r" % (name,))
      return fileinfo["offset"], fileinfo["length"]
  
imports: import errno
  import os
  import sys
  from threading import Lock
  from shutil import copyfileobj
  from whoosh.compat import BytesIO, memoryview_
  from whoosh.filedb.structfile import BufferFile, StructFile
  from whoosh.filedb.filestore import FileStorage, StorageError
  from whoosh.system import emptybytes
  from whoosh.util import random_name
label_desc: Use image node_id 4 for calling the CompoundStorage obj's underlying member method code with example usage: obj.range(name) and returns: fileinfo,  fileinfo