docs: function saveState(instanceId, stateObject, successCallback, errorCallback) {
          var strObject = JSON.stringify(stateObject);
          return neon.util.ajaxUtils.doPostJSON({
              instanceId: instanceId,
              state: strObject
          }, neon.serviceUrl('widgetservice', 'savestate'), {
              success: successCallback,
              error: errorCallback,
              global: false
          });
      }