code: function () {
  				var that = this;
  				return Promise.resolve().then(function () {
  					safeClearInstance(that);
  					sap.ui.getCore().getConfiguration().setUI5CacheOn(false);
  				});
  			}
docs: Shuts-down the Cache Manager (all next calls to it will return an immediately resolved dummy promise with value of <undefined>)
  Usages are meant for testing purposes. Make sure you switch it on so the rest still can use it.
  @see sap.ui.core.cache.CacheManager._switchOn
  @returns {*}
  @protected