/// Returns XML string which represents GUI of the filter
/// By default it returns nothing (no GUI)
virtual std::string xmlRepresentation() const { return ""; }
/// Initializes arguments of a filter. If a filter has no arguments, this method may be
/// not redefined.
/// Returns XML string which represents GUI of the filter
/// By default it returns nothing (no GUI)
virtual std::string xmlRepresentation() const { return ""; }
/// Initializes arguments of a filter. If a filter has no arguments, this method may be
/// not redefined.