private Set removeExtensionsAndExtensionPoints(long contributorId) {
private Set removeExtensionsAndExtensionPoints(String contributorId) {
	private Set removeExtensionsAndExtensionPoints(long contributorId) {		Set affectedNamespaces = new HashSet();		int[] extensions = registryObjects.getExtensionsFrom(contributorId);		for (int i = 0; i < extensions.length; i++) {			String namespace = this.removeExtension(extensions[i]);			if (namespace != null)				affectedNamespaces.add(namespace);		}		// remove extension points		int[] extPoints = registryObjects.getExtensionPointsFrom(contributorId);		for (int i = 0; i < extPoints.length; i++) {			String namespace = this.removeExtensionPoint(extPoints[i]);			if (namespace != null)				affectedNamespaces.add(namespace);		}		return affectedNamespaces;	}