public static NSLayoutConstraint UpdateMultiplier(this NSLayoutConstraint constraint, nfloat multiplier)
{
NSObject firstItem = constraint.FirstItem;
NSObject secondItem = constraint.SecondItem;
NSLayoutAttribute firstAttribute = constraint.FirstAttribute;
NSLayoutAttribute secondAttribute = constraint.SecondAttribute;
NSLayoutConstraint newConstraint = NSLayoutConstraint.Create(firstItem, firstAttribute, constraint.Relation, secondItem, secondAttribute, multiplier, constraint.Constant);
newConstraint.Priority = constraint.Priority;
newConstraint.ShouldBeArchived = constraint.ShouldBeArchived;
newConstraint.SetIdentifier(constraint.GetIdentifier());
newConstraint.Active = true;
NSLayoutConstraint.DeactivateConstraints(new NSLayoutConstraint[] { constraint });
NSLayoutConstraint.DeactivateConstraints(new NSLayoutConstraint[] { newConstraint });
return(newConstraint);
}