Bug 188027 PasteAction is diabled
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/api/SlotHandle.java
* @param content
	 *            handle to the content to move
	 * @param toPosn
	 *            the new position
	 * @throws ContentException
	 *             if the content is not in the slot, or if the to position is
	 *             not valid.
	 */
	public void shift( DesignElementHandle content, int toPosn )
			throws ContentException
	{
		if ( content == null )
			return;
		ContentCommand cmd = new ContentCommand( getModule( ),
				new ContainerContext( getElement( ), slotID ) );
		cmd.movePosition( content.getElement( ), toPosn );
	}
	/**
	 * Moves a content element into a slot in another container element.
	 * 
	 * @param content
	 *            a handle to the element to move
	 * @param newContainer
	 *            a handle to the new container element
	 * @param toSlot
	 *            the target slot ID where the element will be moved to.
	 * @throws ContentException
	 *             if the content is not in this slot or if the new container is
	 *             not, in fact, a container, or if the content cannot go into
	 *             the target slot.