Bug 161383 Support page-break-inside property on report item
Need support page-break-inside property on report items
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/metadata/ElementDefn.java
* identifier of the slot.
	 * 
	 * @param slotID
	 *            The slotID to check.
	 * @return True if the slotID exists, false otherwise.
	 */
	public boolean hasSlot( int slotID )
	{
		if ( slots == null )
			return false;
		return slotID >= 0 && slotID < slots.size( );
	}
	/**
	 * Returns the meta-data definition for a slot given its numeric slot
	 * identifier.
	 * 
	 * @param slotID
	 *            The slot identifier.
	 * @return The slot information. Returns null if this element is not a
	 *         container, or if the ID is not valid for this container.
	 */
	public ISlotDefn getSlot( int slotID )
	{
		if ( slots == null )
			return null;
		if ( slotID < 0 || slotID >= slots.size( ) )
			return null;
		return (SlotDefn) slots.get( slotID );
	}
	/**