code: def dynamize_last_evaluated_key(self, last_evaluated_key):
          
          d = None
          if last_evaluated_key:
              hash_key = last_evaluated_key['HashKeyElement']
              d = {'HashKeyElement': self.dynamize_value(hash_key)}
              if 'RangeKeyElement' in last_evaluated_key:
                  range_key = last_evaluated_key['RangeKeyElement']
                  d['RangeKeyElement'] = self.dynamize_value(range_key)
          return d
docs: Convert a last_evaluated_key parameter into the data structure
          required for Layer1.