Method undo

src/plugins/codeeditor/gui/workspacewidget.cpp:1168–1172

}

void WorkspaceWidget::undo()
{
    if (auto tabWidget = d->currentTabWidget())
        QMetaObject::invokeMethod(tabWidget, "undo", Qt::QueuedConnection);
}

void WorkspaceWidget::reloadFile(const QString &fileName)
{