/// <summary>
/// Specify a method to be run before an existing property mapping.
/// </summary>
/// <typeparam name="TVirtualView">The cross-platform type.</typeparam>
/// <typeparam name="TViewHandler">The handler type.</typeparam>
/// <param name="propertyMapper">The property mapper in which to change the mapping.</param>
/// <param name="key">The name of the property.</param>
/// <param name="method">The method to call before the existing mapping begins.</param>
public static void PrependToMapping <TVirtualView, TViewHandler>(this IPropertyMapper <TVirtualView, TViewHandler> propertyMapper,
string key, Action <TViewHandler, TVirtualView> method)
where TVirtualView : IElement where TViewHandler : IElementHandler
{
propertyMapper.ModifyMapping(key, (handler, view, action) =>
{
method(handler, view);
action?.Invoke(handler, view);
});
}
