Sets the width and height of this Size component based on the aspect mode.
If the aspect mode is 'none' then calling this method will change the aspect ratio, otherwise the current aspect ratio is honored across all other modes.
If snapTo values have been set then the given width and height are snapped first, prior to any further adjustment via min/max values, or a parent.
If minimum and/or maximum dimensions have been specified, the values given to this method will be clamped into that range prior to adjustment, but may still exceed them depending on the aspect mode.
If this Size component has a parent set, and the aspect mode is
envelop, then the given sizes will
be clamped to the range specified by the parent.
The new width of the Size component.
The new height of the Size component. If not given, it will use the
This Size component instance.