question: public Composer toX ( long animDuration , float x , Ease ease ) { AnimParameter beforeParam = mTweenParameterList . size ( ) > 0 ? mTweenParameterList . get ( mTweenParameterList . size ( ) - 1 ) : mInitialParam ; mTweenParameterList . add ( new TweenParameter ( x , beforeParam . y , beforeParam . alpha , beforeParam . scaleX , beforeParam . scaleY , beforeParam . rotation , animDuration , ease ) ) ; return this ; }
target:  Queues a tween from the current values to the target properties. Set duration to 0 to jump to these value. Numeric properties will be tweened from their current value in the tween to the target value.