docs: def get_trust_id(self):
          """Gets the ``Trust``  ``Id`` for this authorization.
  
          return: (osid.id.Id) - the trust ``Id``
          raise:  IllegalState - ``has_trust()`` is ``false``
          *compliance: mandatory -- This method must be implemented.*
  
          """
          # Implemented from template for osid.resource.Resource.get_avatar_id_template
          if not bool(self._my_map['trustId']):
              raise errors.IllegalState('this Authorization has no trust')
          else:
              return Id(self._my_map['trustId'])