//[Obsolete("Use " + nameof(Fail) + "." + nameof(IfNull) + " instead.")]
public static void IfArgumentNull <T>(
[CanBeNull][AssertionCondition(AssertionConditionType.IS_NOT_NULL)][NoEnumeration]
T argumentValue,
[NotNull][System.Diagnostics.CodeAnalysis.NotNull] string argumentName)
{
Fail.RequiresArgumentName(argumentName);
if (argumentValue == null)
{
throw Fail.Because(Violation.WhenArgumentIsNull(argumentName));
}
}