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
}
	public void hidePart(MPart part) {
		if (isInContainer(part)) {
			part.setToBeRendered(false);
		}
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.e4.workbench.modeling.EPartService#getDirtyParts()
	 */
	public Collection<MPart> getDirtyParts() {
		List<MPart> dirtyParts = new ArrayList<MPart>();
		for (MPart part : getParts()) {
			if (part.isDirty()) {
				dirtyParts.add(part);
			}
		}
		return dirtyParts;
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.e4.workbench.modeling.EPartService#save(org.eclipse.e4.ui.model.application.
	 * MSaveablePart, boolean)
	 */
	public boolean savePart(MPart part, boolean confirm) {
		if (!part.isDirty()) {
			return true;
		}