+ },
+ // Get the invert promise for this deferred
+ // If obj is provided, the invert promise aspect is added to the object
+ invert: function( obj ) {
+ if ( obj == null ) {
+ if ( invert ) {
+ return invert;
+ }
+ invert = obj = {};
+ }
+ for( var methodName in promiseMethods ) {
+ obj[ methodName ] = promiseMethods[ methodName ] && deferred[ promiseMethods[methodName] ];
+ }
+ obj.then = invert.then || function( doneCallbacks, failCallbacks ) {
+ deferred.done( failCallbacks ).fail( doneCallbacks );
+ return this;
+ };
+ return obj;