Bug 183918 get relative file path of linkage library
model/org.eclipse.birt.report.model.tests/test/org/eclipse/birt/report/model/library/DesignLoadLibraryTest.java
try
		{
			designHandle.dropLibrary( libHandle );
			fail( );
		}
		catch ( SemanticException e )
		{
			assertEquals(
					LibraryException.DESIGN_EXCEPTION_LIBRARY_HAS_DESCENDENTS,
					e.getErrorCode( ) );
		}
		designHandle.dropLibraryAndBreakExtends( libHandle );
		assertNull( tableHandle.getElement( ).getExtendsElement( ) );
		
		assertEquals( 0, designHandle.getListProperty( Module.LIBRARIES_PROP )
				.size( ) );
		save( );
		compareFile( "TestDropLibrary_golden1.xml" ); 
		
		openDesign( "TestDropLibrary_2.xml" ); 
		LibraryHandle lib2Handle = (LibraryHandle) designHandle.getLibraries( )
				.get( 0 );
		
		LabelHandle mylabelHandle = (LabelHandle) designHandle
				.findElement( "myLabel" ); 
		assertEquals( "25pt", mylabelHandle.getHeight( ).getStringValue( ) ); 
		assertEquals(
				"red", mylabelHandle.getStringProperty( StyleHandle.COLOR_PROP ) ); 
		assertEquals( "First Page", mylabelHandle.getText( ) ); 
		try