| QGIS API Documentation
    3.20.0-Odense (decaadbb31)
    | 
#include "qgslayoutpolylinewidget.h"#include "qgssymbolselectordialog.h"#include "qgsstyle.h"#include "qgssymbollayerutils.h"#include "qgslayoutitemregistry.h"#include "qgslayout.h"#include "qgslayoutundostack.h"#include "qgsvectorlayer.h"#include "qgslinesymbol.h"#include <QButtonGroup>#include <QFileDialog>