docs: def set_items_shuffled(self, shuffle):
          """Sets the shuffle flag.
  
          The shuffle flag may be overidden by other assessment sequencing
          rules.
  
          arg:    shuffle (boolean): ``true`` if the items are shuffled,
                  ``false`` if the items appear in the designated order
          raise:  InvalidArgument - ``shuffle`` is invalid
          raise:  NoAccess - ``Metadata.isReadOnly()`` is ``true``
          *compliance: mandatory -- This method must be implemented.*
  
          """
          # Implemented from template for osid.resource.ResourceForm.set_group_template
          if self.get_items_shuffled_metadata().is_read_only():
              raise errors.NoAccess()
          if not self._is_valid_boolean(shuffle):
              raise errors.InvalidArgument()
          self._my_map['itemsShuffled'] = shuffle