Wt

I'm sure this is the most trivial of questions, but I've searched long and hard without finding an answer.

I have the following model and view

class ScheduledTaskTableModel: public Wt::WStandardItemModel {
public:
    ScheduledTaskTableModel(std::list<ScheduledTask*> const &tasks, WObject* parent);

private:
    std::vector<ScheduledTask*> const tasks_;
};

class CronState: public Wt::WTableView {
public:
    CronState(Wt::WContainerWidget *parent);

private:
    ScheduledTaskTableModel *model_;
};

CronState::CronState(Wt::WContainerWidget *parent) :
        Wt::WTableView(parent), model_(
                new ScheduledTaskTableModel(DatabaseConnection::threadInstance()->load<ScheduledTask>(), this)) {
    setModel(model_);
    setSelectionMode(Wt::NoSelection);
    setSortingEnabled(0, true);
    setSortingEnabled(1, true);
    setColumnAlignment(2, Wt::AlignCenter);
    setAlternatingRowColors(true);
    setEditTriggers(Wt::WAbstractItemView::DoubleClicked);
    setEditOptions( Wt::WAbstractItemView::SingleEditor);
    setHeaderHeight(100);
}

ScheduledTaskTableModel::ScheduledTaskTableModel(std::list<ScheduledTask*> const &tasks, WObject* parent) :
        Wt::WStandardItemModel(parent), tasks_(tasks.begin(), tasks.end()) {
    for (ScheduledTask const *task : tasks_) {
        std::vector<Wt::WStandardItem *> items;
        items.emplace_back(new Wt::WStandardItem(task->get_name()));
        items.emplace_back(new Wt::WStandardItem(SmartEnumTraits<ScheduledTaskType>::toString(task->get_type())));
        items.emplace_back(new Wt::WStandardItem(std::to_string(task->get_enabled())));
        items.emplace_back(new Wt::WStandardItem(task->get_last_run().toStringForDisplay()));
        items.emplace_back(new Wt::WStandardItem(task->scheduleForDisplay()));
        appendRow(items);
    }
}

When displayed, I'd like to have headers on the different columns: "Name", "Type", "Enabled", "Last Run", "Schedule". I cannot find how to do this in the documentation, nor in any posted help requests here or on StackOverflow.

Could someone please tell me the answer to this, very simple, question?