code: def get_agent_lookup_session_for_agency(self, agency_id):
          
          if not self.supports_agent_lookup():
              raise errors.Unimplemented()
          ##
          # Also include check to see if the catalog Id is found otherwise raise errors.NotFound
          ##
          # pylint: disable=no-member
          return sessions.AgentLookupSession(agency_id, runtime=self._runtime)
docs: Gets the ``OsidSession`` associated with the agent lookup service for the given agency.
  
          arg:    agency_id (osid.id.Id): the ``Id`` of the agency
          return: (osid.authentication.AgentLookupSession) - ``an
                  _agent_lookup_session``
          raise:  NotFound - ``agency_id`` not found
          raise:  NullArgument - ``agency_id`` is ``null``
          raise:  OperationFailed - ``unable to complete request``
          raise:  Unimplemented - ``supports_agent_lookup()`` or
                  ``supports_visible_federation()`` is ``false``
          *compliance: optional -- This method must be implemented if
          ``supports_agent_lookup()`` and
          ``supports_visible_federation()`` are ``true``.*