| QGIS API Documentation
    3.20.0-Odense (decaadbb31)
    | 
#include <QRegularExpression>#include "qgis.h"#include "qgsclassificationmethod.h"#include "qgsvectorlayerutils.h"#include "qgsvectorlayer.h"#include "qgsgraduatedsymbolrenderer.h"#include "qgsapplication.h"#include "qgsclassificationmethodregistry.h"#include "qgsxmlutils.h"