code: public static FilterParams fromString(String line) {
  		StringValueMap map = StringValueMap.fromString(line);
  		return new FilterParams(map);
  	}
docs: Parses semicolon-separated key-value pairs and returns them as a
  FilterParams.
  
  @param line semicolon-separated key-value list to initialize FilterParams.
  @return a newly created FilterParams.
  
  @see StringValueMap#toString()