public void Sut_IsActionFileAttachmentObserver(XmlDocumentObserver sut)
 {
     sut.Should().BeAssignableTo <IObserver <ActionFileAttachment> >();
 }
 public void Sut_IsActionNotificationObserver(XmlDocumentObserver sut)
 {
     sut.Should().BeAssignableTo <IObserver <ActionNotification> >();
 }