fMapToCompoundElement.remove(key);
fMapToPackageFragments.remove(key);
	private void removeElement(IPackageFragment frag) {		String key= getKey(frag);		Object object= fMapToCompoundElement.get(key);			if(object instanceof LogicalPackage){			LogicalPackage element= (LogicalPackage) object;			element.remove(frag);			if(element.getFragments().length == 1){				IPackageFragment fragment= element.getFragments()[0];				fMapToCompoundElement.put(key, fragment);						//@Improve: is this correct?				postRemove(element);				postAdd(fragment);				//postRefresh(fragment.getJavaProject());			} return;		} else {			fMapToCompoundElement.remove(key);				postRemove(frag);			}	}