Relative ToParent(Func<RelativeLayout,Double>) Method
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Returns a Constraint object that constrains an element relative to its parent's size.
public static Xamarin.Forms.Constraint RelativeToParent (Func<Xamarin.Forms.RelativeLayout,double> measure);
static member RelativeToParent : Func<Xamarin.Forms.RelativeLayout, double> -> Xamarin.Forms.Constraint