/// <summary>
/// Core update routine.
/// </summary>
/// <param name="context">The context that holds information about the animation.</param>
protected override void UpdateAnimationOverride(AnimationContext context)
{
context.EnsureDefaultTransforms();
double startY = this.Initialize(context.Target as FrameworkElement, this.StartY);
double endY = this.Initialize(context.Target as FrameworkElement, this.EndY);
context.MoveY(this.GetMoveArguments(startY, endY));
base.UpdateAnimationOverride(context);
}