<PackageReference Include="NUnit" Version="4.3.2" />

NUnit.Framework.Constraints.WithOperator

public class WithOperator : PrefixOperator
Represents a constraint that simply wraps the constraint provided as an argument, without any further functionality, but which modifies the order of evaluation because of its precedence.
namespace NUnit.Framework.Constraints { public class WithOperator : PrefixOperator { public WithOperator(); } }