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
*         modules contain.
	 */
	public List getAllDataSources( )
	{
		IModuleNameScope namescope = module
				.getModuleNameSpace( Module.DATA_SOURCE_NAME_SPACE );
		List elementList = namescope
				.getElements( IModuleNameScope.ARBITARY_LEVEL );
		return generateHandleList( elementList );
	}
	/**
	 * Returns data source handles that are visible to this modules.
	 * 
	 * @return data source handles that are visible to this modules.
	 */
	public List getVisibleDataSources( )
	{
		IModuleNameScope namescope = module
				.getModuleNameSpace( Module.DATA_SOURCE_NAME_SPACE );
		List elementList = namescope
				.getElements( IModuleNameScope.NATIVE_LEVEL );
		return generateHandleList( elementList );
	}
	/**
	 * Returns all data set handles that this modules and the included modules
	 * contain.
	 * 
	 * @return all data set handles that this modules and the included modules
	 *         contain.
	 */