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
assertEquals(
				"25pt", myLabel.getLocalProperty( designHandle.getModule( ), Label.HEIGHT_PROP ).toString( ) ); 
		assertEquals( null, myLabel.getLocalProperty(
				designHandle.getModule( ), StyleHandle.COLOR_PROP ) );
		assertEquals( null, myLabel.getLocalProperty(
				designHandle.getModule( ), Label.TEXT_PROP ) );
		
		assertEquals( "25pt", mylabelHandle.getHeight( ).getStringValue( ) ); 
		assertEquals(
				"red", mylabelHandle.getStringProperty( StyleHandle.COLOR_PROP ) ); 
		assertEquals( "First Page", mylabelHandle.getText( ) ); 
		
		assertEquals( 1, designHandle.getListProperty( Module.LIBRARIES_PROP )
				.size( ) );
		design.getActivityStack( ).redo( );
		
		
		myLabel = (Label) mylabelHandle.getElement( );
		assertEquals(
				"25pt", myLabel.getLocalProperty( designHandle.getModule( ), Label.HEIGHT_PROP ).toString( ) ); 
		assertEquals(
				"red", myLabel.getLocalProperty( designHandle.getModule( ), StyleHandle.COLOR_PROP ).toString( ) ); 
		assertEquals(
				"First Page", myLabel.getLocalProperty( designHandle.getModule( ), Label.TEXT_PROP ) ); 
		
		assertEquals( 0, designHandle.getListProperty( Module.LIBRARIES_PROP )
				.size( ) );
	}
	/**
	 * Tests whether the element from the included library is read only.