code: @Override
      public String encodeURL(ServletRequest request, String uri, SessionAffinityContext affinityContext) {
          return encodeURL(null, request, uri, affinityContext);
      }
docs: Method encodeURL
  <p>
  
  @param request
  @param uri
  @param affinityContext
  @return String encoded URI
  @see com.ibm.wsspi.session.ISessionAffinityManager#encodeURL(javax.servlet.ServletRequest, java.lang.String, SessionAffinityContext)