code: def is_range(self):
      return True
  
imports: from __future__ import division
  from whoosh.compat import b, u
  from whoosh.query import qcore, terms, compound, wrappers
  from whoosh.util.times import datetime_to_long
label_desc: Use image node_id 5 for calling the RangeMixin obj's underlying member method code with example usage: obj.is_range() and returns: True