crossFadeTo( fadeInAction, duration, warp = false ) {

		return fadeInAction.crossFadeFrom( this, duration, warp );

	}
Causes this action to fade out and the given action to fade in,
within the passed time interval.

@param {AnimationAction} fadeInAction - The animation action to fade in.
@param {number} duration - The duration of the fade.
@param {boolean} [warp=false] - Whether warping should be used or not.
@return {AnimationAction} A reference to this animation action.