public/ckeditor/4.4dev/core/scriptloader.js
function callbackWrapper() {
					callback && callback.apply( this, arguments );

					// Removed the just loaded script from the queue.
					pending.shift();

					loadNext.call( that );
				}
function callbackWrapper() {
					callback && callback.apply( this, arguments );

					// Removed the just loaded script from the queue.
					pending.shift();

					loadNext.call( that );
				}
function callbackWrapper ( ) { callback && callback . apply ( this , arguments ) ; // Removed the just loaded script from the queue. pending . shift ( ) ; loadNext . call ( that ) ; }
This callback calls the standard callback for the script and loads the very next script from pending list.
This callback calls the standard callback for the script and loads the very next script from pending list .