void create_decoder_form(int index,
shared_ptr<pv::data::decode::Decoder> &dec,
QWidget *parent, QFormLayout *form);
QComboBox* create_channel_selector(QWidget *parent,
void create_decoder_form(int index,
shared_ptr<pv::data::decode::Decoder> &dec,
QWidget *parent, QFormLayout *form);
QComboBox* create_channel_selector(QWidget *parent,