public SPContentTypeViewModel(SPClientContentType contentType, TreeViewItemViewModel parent)
     : this(parent, false)
 {
     if (contentType == null) throw new ArgumentNullException(nameof(contentType));
     _contentType = contentType;
 }
 public SPContentTypeFieldCollectionViewModel(SPClientContentType contentType, SPContentTypeViewModel parent)
     : this(parent, true)
 {
     if (contentType == null) throw new ArgumentNullException(nameof(contentType));
     _contentType = contentType;
 }