void fill_row_from_bus(unsigned row, const InputMapping::Bus &bus);
void setup_channel_choices_from_bus(unsigned row, const InputMapping::Bus &bus);
void cell_changed(int row, int column);
void fill_row_from_bus(unsigned row, const InputMapping::Bus &bus);
void setup_channel_choices_from_bus(unsigned row, const InputMapping::Bus &bus);
void cell_changed(int row, int column);