code: function(action, variation, payload, throttle) {
            OT.analytics.logEvent({
              action: action,
              variation: variation,
              payload: payload,
              'sessionId': _session ? _session.sessionId : null,
              'connectionId': _session &&
                _session.isConnected() ? _session.connection.connectionId : null,
              'partnerId': _session ? _session.apiKey : OT.APIKEY,
              streamId: _streamId
            }, throttle);
          }
docs: / Private Methods