private String getRelativePathFromEventID(HttpClient httpClient, String uid)
			throws CalDAV4JException {
		CalDAVResource resource = getCalDAVResourceForEventUID(httpClient, uid);
		// Do All resources have metadata?
		ResourceMetadata resourceMetadata = resource.getResourceMetadata();
		String href = resourceMetadata.getHref();
		return getRelativePath(href);
	}