"No such signal QObject::finished()" when subclassing QQuickAsyncImageProvider

from PySide6.QtGui import QGuiApplication, QImage
from PySide6.QtQml import QQmlApplicationEngine
from PySide6.QtCore import QObject, QRunnable, QThreadPool, Signal
from PySide6.QtQuick import (QQuickImageResponse, QQuickAsyncImageProvider,
                             QQuickTextureFactory)

class Signaller(QObject):
    done = Signal(QImage)


class AsyncImageResponseRunnable(QRunnable):
    done = Signal(QImage)

    def __init__(self):
        super().__init__()
        self.signaller = Signaller()
        self.done = self.signaller.done

    def run(self):
        image = QImage(400, 400, QImage.Format_RGB32)
        image.fill('red')
        self.done.emit(image)


class AsyncImageResponse(QQuickImageResponse):
    def __init__(self):
        super().__init__()

        runnable = AsyncImageResponseRunnable()
        runnable.done.connect(self.handle_done)
        pool = QThreadPool.globalInstance()
        pool.start(runnable)

    def handle_done(self, image):
        self.image = image
        self.finished.emit()
    
    def textureFactory(self):
        return QQuickTextureFactory.textureFactoryForImage(self.image)


class AsyncImageProvider(QQuickAsyncImageProvider):
    def requestImageResponse(self, image_id, requested_size):
        return AsyncImageResponse()


if __name__ == "__main__":
    app = QGuiApplication()
    engine = QQmlApplicationEngine()
    
    engine.addImageProvider('async_test', AsyncImageProvider())
    
    engine.load('test.qml')
    app.exec()

//test.qml

import QtQuick

Window {
    width: 1200
    height: 800
    visible: true

    Image {
        source: 'image://async_test/test'
    }
}