Bug 188027 PasteAction is diabled
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/api/SlotHandle.java
*/
	public void move( DesignElementHandle content,
			DesignElementHandle newContainer, int toSlot, int newPos )
			throws ContentException
	{
		if ( content == null || newContainer == null )
			return;
		ContentCommand cmd = new ContentCommand( getModule( ),
				new ContainerContext( getElement( ), slotID ) );
		cmd.move( content.getElement( ), new ContainerContext( newContainer
				.getElement( ), toSlot ), newPos );
	}
	/**
	 * Drops a content element from the slot, and clear any reference property
	 * which refers the element to drop.
	 * 
	 * @param content
	 *            a handle to the content to drop
	 * @throws SemanticException
	 *             if the content is not within the slot
	 */
	public void dropAndClear( DesignElementHandle content )
			throws SemanticException
	{
		if ( content == null )
			return;
		ContentCommand cmd = new ContentCommand( getModule( ),
				new ContainerContext( getElement( ), slotID ) );
		cmd.remove( content.getElement( ), false );
	}