def ungrab(self, class_instance):
        class_instance = weakref.ref(class_instance.__self__)
        if self.grab_exclusive_class == class_instance:
            self.grab_exclusive_class = None
        if class_instance in self.grab_list:
            self.grab_list.remove(class_instance)
Ungrab a previously grabbed touch
dataset/ETHPy150Open kivy/kivy/kivy/input/motionevent.py/MotionEvent.ungrab