code: def get_assessment_taken(self, assessment_taken_id):
          
          # Implemented from template for
          # osid.resource.ResourceLookupSession.get_resource
          # NOTE: This implementation currently ignores plenary view
          collection = JSONClientValidated('assessment',
                                           collection='AssessmentTaken',
                                           runtime=self._runtime)
          result = collection.find_one(
              dict({'_id': ObjectId(self._get_id(assessment_taken_id, 'assessment').get_identifier())},
                   **self._view_filter()))
          return objects.AssessmentTaken(osid_object_map=result, runtime=self._runtime, proxy=self._proxy)
docs: Gets the ``AssessmentTaken`` specified by its ``Id``.
  
          In plenary mode, the exact ``Id`` is found or a ``NotFound``
          results. Otherwise, the returned ``AssessmentTaken`` may have a
          different ``Id`` than requested, such as the case where a
          duplicate ``Id`` was assigned to an ``AssessmentTaken`` and
          retained for compatibility.
  
          arg:    assessment_taken_id (osid.id.Id): ``Id`` of the
                  ``AssessmentTaken``
          return: (osid.assessment.AssessmentTaken) - the assessment taken
          raise:  NotFound - ``assessment_taken_id`` not found
          raise:  NullArgument - ``assessment_taken_id`` is ``null``
          raise:  OperationFailed - unable to complete request
          raise:  PermissionDenied - authorization failure occurred
          *compliance: mandatory -- This method is must be implemented.*