Bug 152830 Need model's support to add jar files
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/api/ModuleHandle.java
{
		return getModule( ).getMessage( resourceKey, locale );
	}
	/**
	 * Return a list of user-defined message keys. The list contained resource
	 * keys defined in the report itself and the keys defined in the referenced
	 * message files for the current thread's locale. The list returned contains
	 * no duplicate keys.
	 * 
	 * @return a list of user-defined message keys.
	 */
	public List getMessageKeys( )
	{
		return getModule( ).getMessageKeys( );
	}
	/**
	 * Returns a slot handle to work with the top-level parameters and parameter
	 * groups within the report. The order that the items appear within the slot
	 * determines the order in which they appear in the "requester" UI.
	 * 
	 * @return A handle for working with the parameters and parameter groups.
	 */
	public SlotHandle getParameters( )
	{
		return getSlot( PARAMETER_SLOT );
	}
	/**
	 * Returns a cascading parameter group handle with the given group name
	 * 
	 * @param groupName