code: public AuthorizationRequest setParameters(Map<String, String[]> parameters)
      {
          return setParameters(URLCoder.formUrlEncode(parameters));
      }
docs: Set the value of {@code parameters} which are the request
  parameters that the OAuth 2.0 authorization endpoint of the
  service implementation received from the client application.
  
  <p>
  This method converts the given map into a string in {@code
  x-www-form-urlencoded} format and passes it to {@link
  #setParameters(String)} method.
  </p>
  
  @param parameters
  Request parameters.
  
  @return
  {@code this} object.
  
  @since 1.24