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
MPartStack partStackA = MApplicationFactory.eINSTANCE.createPartStack();
		window.getChildren().add(partStackA);
		MPartStack partStackB = MApplicationFactory.eINSTANCE.createPartStack();
		partStackB.getTags().add("aCategory");
		window.getChildren().add(partStackB);
		MPart partA = MApplicationFactory.eINSTANCE.createPart();
		partA.setId("partA");
		partStackA.getChildren().add(partA);
		partStackA.setSelectedElement(partA);
		window.setSelectedElement(partStackA);
		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 partB = partService.showPart("partB",
				EPartService.PartState.VISIBLE);
		assertEquals(1, partStackA.getChildren().size());
		assertEquals(
				"Only making a part visible, the active part should not have changed",
				partA, partService.getActivePart());
		assertNotNull("The shown part should have a context", partB
				.getContext());
		assertTrue(
				"The part is the only one in the stack, it should be visible",
				partService.isPartVisible(partB));
	}
	public void testShowPart_Id_VISIBLE4() {