| QGIS API Documentation
    3.20.0-Odense (decaadbb31)
    | 
#include "qgsmodelgraphicsscene.h"#include "qgsprocessingmodelchildparametersource.h"#include "qgsprocessingmodelalgorithm.h"#include "qgsmodelcomponentgraphicitem.h"#include "qgsmodelarrowitem.h"#include "qgsprocessingmodelgroupbox.h"#include "qgsmessagebar.h"#include "qgsmessagebaritem.h"#include "qgsmessageviewer.h"#include "qgsapplication.h"#include <QGraphicsSceneMouseEvent>#include <QPushButton>