PySide2.QtGui.QOpenGLContext.versionFunction(...) returns a QAbstractOpenGLFunctions

from PySide2.QtCore import QUrl
from PySide2.QtQuick import QQuickView
from PySide2.QtQml import QQmlApplicationEngine
from PySide2.QtGui import QGuiApplication, QOpenGLVersionProfile, QSurfaceFormat, QVector3D

if __name__ == '__main__':    
    fmt = QSurfaceFormat()
    fmt.setProfile(QSurfaceFormat.CoreProfile)
    fmt.setVersion( 4, 1 )
    fmt.setAlphaBufferSize(8)
    fmt.setStencilBufferSize(8)
    fmt.setDepthBufferSize(24)
    fmt.setOption(QSurfaceFormat.DebugContext)    

    profile = QOpenGLVersionProfile()
    profile.setProfile(QSurfaceFormat.CoreProfile)
    profile.setVersion( 4, 1 )
    app = QGuiApplication(sys.argv)
    QSurfaceFormat.setDefaultFormat(fmt)
    view = QQuickView()
    view.setSource( QUrl.fromLocalFile('whatever.qml') )
    view.show()
    QGuiApplication.processEvents()
    gl = view.openglContext().versionFunctions(profile)
    gl.glClearColor(0,0,0,0) #FAILS with AttributeError: 'PySide2.QtGui.QAbstractOpenGLFunctions' object has no attribute 'glClearColor'

***:~$ locate QOpenGLFunctions

/home/***/.local/lib/python3.6/site-packages/PyQt5/_QOpenGLFunctions_2_0.so

/home/***/.local/lib/python3.6/site-packages/PyQt5/_QOpenGLFunctions_2_1.so

/home/***/.local/lib/python3.6/site-packages/PyQt5/_QOpenGLFunctions_4_1_Core.so

import QtQuick 2.5
Rectangle
{
    height: 800
    width: 800
    color: "blue"
}