Bug 142462 Cannot create bindings for data set output parameters
Define a JDBC Stored Procedure data set with at least one data set output parameter. Bind this data set to a table. Edit data binding for the table and add a new binding. In the expression builder, under "Available Data Sets", only the columns for the data set are shown as available. The output parameters are not shown. This is a regression against 2.0. This bug makes data set parameters unusable.
UI/org.eclipse.birt.report.designer.core/src/org/eclipse/birt/report/designer/util/DEUtil.java
* @param parent
	 * @param child
	 * @return slot id
	 */
	public static int getSlotID( Object parent, Object child )
	{
		assert parent instanceof DesignElementHandle;
		int slotID = -1;
		if ( child != null )
		{
			slotID = findSlotID( parent, child );
		}
		else
		{
			slotID = getDefaultSlotID( parent );
		}
		return slotID;
	}
	/**
	 * Find the position of the element. If the element is null, the position is
	 * last
	 * 
	 * @param parent
	 * @param element
	 * @return position
	 */
	public static int findInsertPosition( DesignElementHandle parent,
			DesignElementHandle element )
	{