QML Camera ImageCapture Parameter not declared

QML Camera: ImageCapture: imageSaved(requestId, path) doesn’t work. path is not known.

So I compared the QML Camera doc with QCamera: QImageCapture: imageSaved(id, fileName).

fileName is working on QML Camera: ImageCapture:

onImageSaved: {
  console.log("requestId: ",requestId," fileName: ", fileName)
  lastSavedImageFileName = fileName
  photoPreview.source = "file://"+fileName
} 

But now there’s a warning in the logs:

W qt.qml.context: : qrc:/qml/photo/CapturePhotoPage.qml:163:13 Parameter "fileName" is not declared. Injection of parameters into signal handlers is deprecated. Use JavaScript functions with formal parameters instead. 

there seems to be a mismatch between the docs and implementation

same happens with 

onErrorOccured: {}

where message doesn't work - you must use errorString. errorString works, but there's same warning as for fileName.