maui-linux/Xamarin.Forms.Core/LineHeightElement.cs

using Xamarin.Forms.Internals;

namespace Xamarin.Forms
{
	static class LineHeightElement
	{
		public static readonly BindableProperty LineHeightProperty = 
			BindableProperty.Create(nameof(ILineHeightElement.LineHeight), typeof(double), typeof(ILineHeightElement), -1.0d,
									propertyChanged: OnLineHeightChanged);

		static void OnLineHeightChanged(BindableObject bindable, object oldValue, object newValue)
		{
			((ILineHeightElement)bindable).OnLineHeightChanged((double)oldValue, (double)newValue);
		}

	}
}