def processAlgorithm(self, parameters, context, feedback):
    (sink, self.dest_id) = self.parameterAsSink(parameters, 'Output', context,
                                                list_of_fields,
                                                QgsWkbTypes.Polygon,
                                                CRS)

    for result in results:
        if feedback.isCanceled():
            break

        # Do smth smart

        sink.addFeature(result)

    return {'Output': self.dest_id}