Bug 304239 move each core application service to its own package
In M4, some services have their own package, others are provided in core.services. Boris and I talked about moving each service (API) to its own package. Reasons are: - aids with discoverability - helps separate application services from other public API in the core.services package (such as IDisposable, JSONObject) - helps to emphasize that services can be setup and consumed individually - will make it easier to move to separate bundles if that is ever needed This means moving Adapter, Logger, IStatusHandler to their own packages.
tests/org.eclipse.e4.ui.tests/src/org/eclipse/e4/ui/tests/application/EPartServiceTest.java
partDescriptor.setId("partB");
		partDescriptor.setCategory("aCategory");
		application.getDescriptors().add(partDescriptor);
		MPartStack partStack = MApplicationFactory.eINSTANCE.createPartStack();
		partStack.setId("aCategory");
		window.getChildren().add(partStack);
		MPart partA = MApplicationFactory.eINSTANCE.createPart();
		partA.setId("partA");
		partStack.getChildren().add(partA);
		MPart partB = MApplicationFactory.eINSTANCE.createPart();
		partB.setId("partB");
		partB.setToBeRendered(false);
		partStack.getChildren().add(partB);
		partStack.setSelectedElement(partA);
		window.setSelectedElement(partStack);
		application.setSelectedElement(window);
		initialize(applicationContext, application);
		getEngine().createGui(window);
		EPartService partService = (EPartService) window.getContext().get(
				EPartService.class.getName());
		partService.activate(partA);
		assertEquals(partA, partService.getActivePart());
		MPart shownPart = partService.showPart("partB",
				EPartService.PartState.VISIBLE);
		assertEquals(2, partStack.getChildren().size());
		assertEquals(
				"The part is in the same stack as the active part, so the active part should not have changed",
				partA, partService.getActivePart());
		assertNotNull("The shown part should have a context", partB
				.getContext());