addImportPath - QDeclarativeView?

Hi guys, i have an application which loads a Qml-File with the “QDeclarativeView”. My Qml-Files are extended by several QtQuick-Plugins, these are located in a custom directory. I found several things about the “QDeclarativeEngine” to add an import path, but nothing about the QDeclarativeView. QDeclarativeEngine::addImportPath() or QML_IMPORT_PATH How can i add this custom directory to my application using the “QDeclarativeView”?