Bug 156497 [Regression][Acceptance]Report isn't refreshed when delete used library file.
Description: Report isn't refreshed when delete used library file. Steps to reproduce: 1.New a library, add a label, input actuate. 2.New a report, extend lib.label 3.Delete the library file. 4.Refresh the report in Outline of the report Expected result: Empty label in Layout. Actual result: label with content "actuate" in Layout.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/api/ModuleHandle.java
* 
	 * @return theme handles according the input level
	 */
	public List getVisibleThemes( int level )
	{
		List elementList = module.getModuleNameSpace( Module.THEME_NAME_SPACE )
				.getElements( level );
		return generateHandleList( elementList );
	}
	/**
	 * Returns parameters and parameter groups on the module. Those parameters
	 * included in the parameter groups are not included in the return list.
	 * 
	 * @return parameters and parameter groups
	 */
	public List getParametersAndParameterGroups( )
	{
		SlotHandle params = getSlot( PARAMETER_SLOT );
		List retList = new ArrayList( );
		for ( int i = 0; i < params.getCount( ); i++ )
		{
			retList.add( params.get( i ) );
		}
		return retList;
	}
	/**
	 * Returns all data source handles that this modules and the included
	 * modules contain.
	 * 
	 * @return all data source handles that this modules and the included