resultCallback capability missing from runJavaScript function

The current PySide2 5.9 branch (5.9.0a1 - built on Windows via https://codereview.qt-project.org/pyside/pyside-setup on 20 April 2018) contains the QWebEnginePage.runJavaScript() function.

This function works fine with a single argument containing a string of JavaScript code.  However, there is no ability to return a 'resultCallback' as in the original Qt function:
https://doc.qt.io/qt-5.9/qwebenginepage.html#runJavaScript-2

The following, for example:

class Browser(QtWebEngineWidgets.QWebEngineView):
    def _init_(self, main, mainWin, centralWidget):
        super()._init_()

    def buttonPushed(self):
        self.page().runJavaScript('hello', self.printResult)

    def printResult(self, result):
       print(result)

generates:
TypeError: 'PySide2.QtWebEngineWidgets.QWebEnginePage.runJavaScript' called with wrong argument types:
  PySide2.QtWebEngineWidgets.QWebEnginePage.runJavaScript(str, method)
Supported signatures:
  PySide2.QtWebEngineWidgets.QWebEnginePage.runJavaScript(unicode)
  PySide2.QtWebEngineWidgets.QWebEnginePage.runJavaScript(unicode, unsigned int)

Are their plans to update this function to return callback results?

(I am aware that it is possible to work around this by getting JavaScript to create a console message, which can then be filtered by overriding QWebEnginePage.consoleMessage.  But, it would be nice to be able to exploit the full capability of the original runJavaScript function.)

Thanks.