private void AssertParameter(ParameterDescriptor descriptor, string name, object value)
 {
     Assert.That(descriptor.IsConstant, Is.True);
     Assert.That(descriptor.RawName, Is.EqualTo(name));
     Assert.That(descriptor.ValueEvaluator(null), Is.EqualTo(value));
     Assert.That(descriptor.ParameterInfo.Name, Is.EqualTo(name));
 }