/**
   * Returns the <tt>URL</tt> of the image corresponding to the given key.
   *
   * @param urlKey The identifier of the image in the resource properties file.
   * @return the <tt>URL</tt> of the image corresponding to the given key
   */
  public URL getImageURL(String urlKey) {
    String path = getImagePath(urlKey);

    if (path == null || path.length() == 0) {
      if (logger.isInfoEnabled()) logger.info("Missing resource for key: " + urlKey);
      return null;
    }
    return getImageURLForPath(path);
  }