Bug 210609 [Smoke]Crosstab is failed to preview in runtime
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/internal/ui/extension/ExtensionPointManager.java
*/
	public List getExtendedElementPoints( )
	{
		return Arrays.asList( getReportItemUIMap( ).values( ).toArray( ) );
	}
	/**
	 * Gets the extended element point with the specified extension name.
	 * 
	 * @param extensionName
	 *            the extension name of the extended element
	 * 
	 * @return Returns the extended element point, or null if any problem exists
	 */
	public ExtendedElementUIPoint getExtendedElementPoint( String extensionName )
	{
		Assert.isLegal( extensionName != null );
		return (ExtendedElementUIPoint) getReportItemUIMap( ).get( extensionName );
	}
	/**
	 * Returns the menu builder for the given element.
	 * 
	 * @param elementName
	 *            the name of the element
	 * @return the menu builder, or null if there's no builder defined for the
	 *         element
	 */
	public IMenuBuilder getMenuBuilder( String elementName )
	{
		return (IMenuBuilder) getMenuBuilderMap( ).get( elementName );
	}