Bug 331010 Track Model-Element contributors
We need to track which bundle contributed an model element to e.g. look up translations in the right package
bundles/org.eclipse.e4.ui.workbench/src/org/eclipse/e4/ui/internal/workbench/PartServiceImpl.java
MPlaceholder placeholder = providedPart.getCurSharedRef();
					if (placeholder == null) {
						container.getChildren().add(providedPart);
					} else {
						container.getChildren().add(placeholder);
					}
				}
			}
		}
		return providedPart;
	}
	private void adjustPlaceholder(MPart part) {
		if (isShared(part)) {
			MPlaceholder placeholder = part.getCurSharedRef();
			
			if (placeholder == null
			
			
			
					|| (placeholder.getParent() != null && !isInContainer(placeholder))) {
				placeholder = createSharedPart(part);
				part.setCurSharedRef(placeholder);
			}
		}
	}
	private boolean isShared(MPart part) {
		return getWindow().getSharedElements().contains(part);
	}
	private void addToLastContainer(String category, MPart part) {
		MElementContainer<?> lastContainer = getLastContainer();