src/sap.ui.core/src/sap/ui/core/AppCacheBuster.js
function(descriptor) {
					var newDescriptor = {
						get: descriptor.get,
						set: function(val) {
							if (fnIsACBUrl(val)) {
								val = fnConvertUrl(val);
							}
							descriptor.set.call(this, val);
						},
						enumerable: descriptor.enumerable,
						configurable: descriptor.configurable
					};
					newDescriptor.set._sapUiCoreACB = true;
					return newDescriptor;
				}
function(descriptor) {
					var newDescriptor = {
						get: descriptor.get,
						set: function(val) {
							if (fnIsACBUrl(val)) {
								val = fnConvertUrl(val);
							}
							descriptor.set.call(this, val);
						},
						enumerable: descriptor.enumerable,
						configurable: descriptor.configurable
					};
					newDescriptor.set._sapUiCoreACB = true;
					return newDescriptor;
				}
function ( descriptor ) { var newDescriptor = { get : descriptor . get , set : function ( val ) { if ( fnIsACBUrl ( val ) ) { val = fnConvertUrl ( val ) ; } descriptor . set . call ( this , val ) ; } , enumerable : descriptor . enumerable , configurable : descriptor . configurable } ; newDescriptor . set . _sapUiCoreACB = true ; return newDescriptor ; }
create an interceptor description which validates the value of the setter whether to rewrite the URL or not
create an interceptor description which validates the value of the setter whether to rewrite the URL or not