code: public static String unescapeLink(String source) {
  
          if (source == null) {
              return null;
          }
          return CmsStringUtil.substitute(source, "&amp;", "&");
  
      }
docs: Unescapes all <code>&amp;amp;</code>, that is replaces them with a <code>&</code>.<p>
  
  @param source the String to unescape
  @return the unescaped String