internal WidgetActions(
     Annotation parent,
     PdfDirectObject baseObject
     )
     : base(parent, baseObject)
 {
 }

   internal RemoteDestination(
 PdfDirectObject baseObject,
 PdfString name
 )
       : base(baseObject, name)
   {
   }

   /**
     <summary>Instantiates a wrapper in case of reference or mutable data object.</summary>
     <param name="baseObject">PDF object backing this wrapper. MUST be a <see cref="PdfReference"/>
     everytime available.</param>
   */
   protected PdfObjectWrapper(
 PdfDirectObject baseObject
 )
   {
       BaseObject = baseObject;
         container = (baseObject != null ? baseObject.Container : null);
   }

   internal JavaScript(
 PdfDirectObject baseObject,
 PdfString name
 )
       : base(baseObject, name)
   {
   }

   protected DeviceColor(
 DeviceColorSpace colorSpace,
 PdfDirectObject baseObject
 )
       : base(colorSpace, baseObject)
   {
   }

   protected LeveledColor(
 ColorSpace colorSpace,
 PdfDirectObject baseObject
 )
       : base(colorSpace, baseObject)
   {
   }

   public MarkedContentPoint(
 PdfName tag,
 PdfDirectObject properties
 )
       : base(tag, properties)
   {
   }

   //TODO:verify (colorspace is available or may be implicit?)
   protected Pattern(
 PatternColorSpace colorSpace,
 PdfDirectObject baseObject
 )
       : base(colorSpace, baseObject)
   {
   }

   public GenericOperation(
 string operator_,
 PdfDirectObject operand
 )
       : base(operator_,operand)
   {
   }

 internal TilingPattern(
     PatternColorSpace colorSpace,
     PdfDirectObject baseObject
     )
     : base(colorSpace, baseObject)
 {
 }

        protected Operation(
      string operator_,
      PdfDirectObject operand
      )
        {
            this.operator_ = operator_;

              this.operands = new List<PdfDirectObject>();
              this.operands.Add(operand);
        }

        public static ILayerNode Wrap(
            PdfDirectObject baseObject
            )
        {
            if(baseObject == null)
            return null;

              PdfDataObject baseDataObject = baseObject.Resolve();
              if(baseDataObject is PdfDictionary)
            return Layer.Wrap(baseObject);
              else if(baseDataObject is PdfArray)
            return Layers.Wrap(baseObject);
              else
            throw new ArgumentException(baseDataObject.GetType().Name + " is NOT a valid layer node.");
        }

 internal GoToFirstPage(
     PdfDirectObject baseObject
     )
     : base(baseObject)
 {
 }

 internal ListBox(
     PdfDirectObject baseObject
     )
     : base(baseObject)
 {
 }

 //TODO:implement function creation!
 internal Type0Function(
     PdfDirectObject baseObject
     )
     : base(baseObject)
 {
 }

 internal JavaScript(
     PdfDirectObject baseObject
     )
     : base(baseObject)
 {
 }

 protected internal Widget(
     PdfDirectObject baseObject
     )
     : base(baseObject)
 {
 }

   internal FullFileSpecification(
 PdfDirectObject baseObject
 )
       : base(baseObject)
   {
   }

 public static Widget Wrap(
     PdfDirectObject baseObject,
     Field field
     )
 {
     return field is CheckBox
       || field is RadioButton
     ? new DualWidget(baseObject)
     : new Widget(baseObject);
 }

 internal SubmitForm(
     PdfDirectObject baseObject
     )
     : base(baseObject)
 {
 }