public void AUT_NullableEnumRequestSpecification_Is_Instance_Type_Verify_Test()
 {
     // Assert
     _nullableEnumRequestSpecificationInstance.ShouldBeAssignableTo <NullableEnumRequestSpecification>();
     _nullableEnumRequestSpecificationInstanceFixture.ShouldBeAssignableTo <NullableEnumRequestSpecification>();
     CurrentInstance.ShouldBeAssignableTo <NullableEnumRequestSpecification>();
 }