src/store-engine.js
function super_fn() {
					if (!oldFn) { return }
					each(arguments, function(arg, i) {
						args[i] = arg
					})
					return oldFn.apply(self, args)
				}
function super_fn() {
					if (!oldFn) { return }
					each(arguments, function(arg, i) {
						args[i] = arg
					})
					return oldFn.apply(self, args)
				}
function super_fn ( ) { if ( ! oldFn ) { return } each ( arguments , function ( arg , i ) { args [ i ] = arg } ) return oldFn . apply ( self , args ) }
super_fn calls the old function which was overwritten by this mixin.
super_fn calls the old function which was overwritten by this mixin .