static QByteArray updateChunkValues(QgsCopcPointCloudIndex *copcIndex, const QByteArray &chunkData, const QgsPointCloudAttribute &attribute, const QgsPointCloudNodeId &n, const QHash< int, double > &pointValues, std::optional< double > newValue=std::nullopt)
Sets new classification value for the given points in voxel and return updated chunk data.