code: def sorted_items(self):
      if self._sorted is None:
          self._sorted = sorted(self.items())
      return self._sorted
  
imports: from __future__ import print_function, division, absolute_import
  import collections
label_desc: Use image node_id 3 for calling the ReqsModules obj's underlying member method code with example usage: obj.sorted_items() and returns: self