make Wrapper::getExtraFilterArgs mandatory implementation
make Wrapper::getExtraFilterArgs mandatory implementation

katrinleinweber/podlove-publisher,noplanman/podlove-publisher,katrinleinweber/podlove-publisher,podlove/podlove-publisher,katrinleinweber/podlove-publisher,noplanman/podlove-publisher,katrinleinweber/podlove-publisher,noplanman/podlove-publisher,podlove/podlove-publisher,noplanman/podlove-publisher,podlove/podlove-publisher,podlove/podlove-publisher,podlove/podlove-publisher,podlove/podlove-publisher,noplanman/podlove-publisher,katrinleinweber/podlove-publisher