QScreenRayCaster

It seems that QScreenRayCaster cannot be used in Python via PySide 2.
 
def _init_(self):
    # some code
    self.screen_ray_caster = Qt3DRender.QScreenRayCaster(self.root_entity)
    # some code
 
def some_mouse_event(self, e):
    self.screen_ray_caster.trigger(e.pos())
    self.screen_ray_caster.hits()
 

And error is thrown:

AttributeError: 'PySide2.Qt3DRender.Qt3DRender.QScreenRayCaster' object has no attribute 'hits'

I also tried to get information via signals and so I wrote this line:
 
self.screen_ray_caster.hitsChanged.connect(self.test)

Sadly this method has never been called.