void setup_channel_choices_from_bus(unsigned row, const InputMapping::Bus &bus);
void cell_changed(int row, int column);
void card_selected(QComboBox *card_combo, unsigned row, int index);
void channel_selected(unsigned row, unsigned channel, int index);
void setup_channel_choices_from_bus(unsigned row, const InputMapping::Bus &bus);
void cell_changed(int row, int column);
void card_selected(QComboBox *card_combo, unsigned row, int index);
void channel_selected(unsigned row, unsigned channel, int index);