code: public static Map<String, List<StringValue>> getPageParametersMap(final Request request)
  	{
  		final Map<String, List<StringValue>> map = new HashMap<>();
  		addToParameters(request.getRequestParameters(), map);
  		addToParameters(request.getQueryParameters(), map);
  		addToParameters(request.getPostParameters(), map);
  		return map;
  	}
docs: Gets a map with all parameters. Looks in the query, request and post parameters.
  
  @param request
  the request
  @return a map with all parameters.