/// <summary>
/// Adds mouse wheel support to a <see cref="ScrollViewer"/>.
/// As long as the <see cref="ScrollViewer"/> has focus,
/// the mouse wheel can be used to scroll up and down.
/// </summary>
/// <param name="parentScrollViewer">The parent <see cref="ScrollViewer"/> which contains another <see cref="ScrollViewer"/> which should have mouse wheel scrolling support.</param>
/// <param name="childScrollViewer">A child <see cref="ScrollViewer"/> to add mouse wheel scrolling support to.</param>
/// <returns>The child <see cref="ScrollViewer"/>.</returns>
public static ScrollViewer AddMouseWheelSupport(this ScrollViewer parentScrollViewer, ScrollViewer childScrollViewer)
{
return(parentScrollViewer.AddMouseWheelSupport(childScrollViewer, DEFAULT_SCROLL_AMOUNT));
}