During the initial setup, jQuery.Animation will call any callbacks that have been registered through jQuery.Animation.prefilter( function( element, props, opts ) ).
The prefilter will have this set to an animation object, and you can modify any of the props or
opts however you need. The prefilter may return its own promise which also implements stop(),
in which case, processing of prefilters stops. If the prefilter is not trying to override the animation
entirely, it should return undefined or some other falsy value.
A "Tweener" is a function responsible for creating a tween object, and you might want to override these if you want to implement complex values ( like a clip/transform array matrix ) in a single property.
You can override the default process for creating a tween in order to provide your own tween object by using jQuery.Animation.tweener( props, callback( prop, value ) ).
A space separated list of properties to be passed to your tweener, or "*" if it should be called
for all properties.
The callback will be called with this being an Animation object. The tweener function will
generally start with var tween = this.createTween( prop, value );, but doesn't nessecarily need to
use the jQuery.Tween() factory.
``
1.8