Xamarin.Forms custom markup extension because there is no built-in TypeConverter for Images embedded as resources

EmbeddedImageResourceExtension.cs

using System;
using Xamarin.Forms.Xaml;
using Xamarin.Forms;

namespace WorkingWithImages
{
	// You exclude the 'Extension' suffix when using in Xaml markup
	[ContentProperty ("Source")]
	public class ImageResourceExtension : IMarkupExtension
	{
		public string Source { get; set; }

		public object ProvideValue (IServiceProvider serviceProvider)
		{
			if (Source == null)
				return null;

			// Do your translation lookup here, using whatever method you require
			var imageSource = ImageSource.FromResource(Source); 

			return imageSource;
		}
	}
}

EmbeddedImages.xaml

<?xml version="1.0" encoding="UTF-8" ?>
<ContentPage
    xmlns="http://xamarin.com/schemas/2014/forms"
    xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
    xmlns:local="clr-namespace:WorkingWithImages;assembly=WorkingWithImages"
    x:Class="WorkingWithImages.EmbeddedImagesXaml">
   	<ContentPage.Padding>
		<OnPlatform x:TypeArguments="Thickness">
			<OnPlatform.iOS>0, 20, 0, 0</OnPlatform.iOS>
		</OnPlatform>
	</ContentPage.Padding>
  <StackLayout VerticalOptions="Center" HorizontalOptions="Center">
    <Label Text="Image Resource Xaml" />
    
    <!-- uses a custom Extension defined in this project for now -->
    <Image Source="{local:ImageResource WorkingWithImages.beach.jpg}" />

    <Label Text="WorkingWithImages.beach.jpg embedded resource" />
  </StackLayout>
</ContentPage>

this code just doesn't work for me. I did not get a breakpoint hit neither in the get/set of the property nor in the ProvideValue method