Bug 303305 EPS cannot handle being asked for from the application's context
Right now we have this... @Inject @Named(EPartService.PART_SERVICE_ROOT) private MElementContainer<MUIElement> rootContainer; ...which will be 'null' if the question was posed to the application's context. Right now, I cannot use EPS in the SaveHandler because I get an (effectively) useless EPartService (filled with null fields).
bundles/org.eclipse.e4.ui.workbench/src/org/eclipse/e4/workbench/ui/internal/PartServiceImpl.java
MElementContainer<MUIElement> parent = curElement.getParent();
				curElement.setToBeRendered(true);
				if (parent.getSelectedElement() != curElement) {
					parent.setSelectedElement(curElement);
				}
				curElement = parent;
			}
			if (curContext == null) {
				curContext = part.getContext();
			}
			IEclipseContext parentContext = pwc.getContext();
			if (parentContext != null) {
				parentContext.set(IContextConstants.ACTIVE_CHILD, curContext);
				curContext = parentContext;
			}
			pwc = getParentWithContext((MUIElement) pwc);
		}
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.e4.workbench.modeling.EPartService#getActivePart()
	 */
	public MPart getActivePart() {
		return activePart;
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see