     private var clipAndEnableScrollingChanged:Boolean = false;
 
     /**
-     *  @copy mx.layout.LayoutBase#clipAndEnableScrolling
+     *  @copy spark.core.IViewport#clipAndEnableScrolling
+     *
+     *  @default false
      *  
      *  @langversion 3.0
      *  @playerversion Flash 10

     */
    [RichTextContent]
        
	/**
	 *  This property is intended for use in MXML at compile time;
	 *  to get or set rich text content at runtime,
	 *  please use the <code>textFlow</code> property instead.
	 *
	 *  <p>The <code>content</code> property is the default property
	 *  for RichEditableText, so that you can write MXML such as
	 *  <pre>
	 *  &lt;s:RichEditableText&gt;Hello &lt;s:span fontWeight="bold"/&gt;World&lt;/s:span&gt;&lt;/s:RichEditableText&gt;
	 *  </pre>
	 *  and have the String and SpanElement that you specify
	 *  as the content be used to create a TextFlow.</p>
	 *
	 *  <p>This property is typed as Object because you can set it to
	 *  to a String, a FlowElement, or an Array of Strings and FlowElements.
	 *  In the example above, you are specifying the content
	 *  to be a 2-element Array whose first element is the String
	 *  "Hello" and whose second element is a SpanElement with the text
	 *  "World" in boldface.</p>
	 * 
	 *  <p>No matter how you specify the content, it gets converted
	 *  into a TextFlow, and when you get this property, you will get
	 *  the resulting TextFlow.</p>
	 * 
	 *  <p>Adobe recommends using <code>textFlow</code> property
	 *  to get and set rich text content at runtime,
	 *  because it is strongly typed as a TextFlow
	 *  rather than as an Object.
	 *  A TextFlow is the canonical representation
	 *  for rich text content in the Text Layout Framework.</p>
	 * 
	 *  @langversion 3.0
	 *  @playerversion Flash 10
	 *  @playerversion AIR 1.5
	 *  @productversion Flex 4
	 */
	public function get content():Object
	{
		return textFlow;
	}
	
	/**
	 *  @private
	 */   
    public function set content(value:Object):void
    {
        // Treat setting the 'content' to null

    
    /**
     *  The number of pixels by which the text is scrolled vertically.
     *
     *  <p>To scroll over the text vertically, vary the 
     *  <code>verticalScrollPosition</code> between 0 and
     *  <code>contentHeight - height</code>.</p>
     *
     *  @default 0
     *  
     *  @langversion 3.0
     *  @playerversion Flash 10
