def _get_assessment_taken(self, assessment_taken_id):
if assessment_taken_id not in self._assessments_taken:<EOL><INDENT>mgr = self._get_provider_manager('<STR_LIT>')<EOL>lookup_session = mgr.get_assessment_taken_lookup_session(proxy=self._proxy)  <EOL>lookup_session.use_federated_bank_view()<EOL>self._assessments_taken[assessment_taken_id] = (<EOL>lookup_session.get_assessment_taken(assessment_taken_id))<EOL><DEDENT>return self._assessments_taken[assessment_taken_id]<EOL>
Helper method for getting an AssessmentTaken objects given an Id.