code: def get_resource_by_agent(self, agent_id):
          
          collection = JSONClientValidated('resource',
                                           collection='Resource',
                                           runtime=self._runtime)
          result = collection.find_one(
              dict({'agentIds': {'$in': [str(agent_id)]}},
                   **self._view_filter()))
          return objects.Resource(
              osid_object_map=result,
              runtime=self._runtime,
              proxy=self._proxy)
docs: Gets the ``Resource`` associated with the given agent.
  
          arg:    agent_id (osid.id.Id): ``Id`` of the ``Agent``
          return: (osid.resource.Resource) - associated resource
          raise:  NotFound - ``agent_id`` is not found
          raise:  NullArgument - ``agent_id`` is ``null``
          raise:  OperationFailed - unable to complete request
          raise:  PermissionDenied - authorization failure
          *compliance: mandatory -- This method must be implemented.*