docs: def is_touched(self, position):
          """Hit detection method.
          
          Indicates if this key has been hit by a touch / click event at the given position.
  
          :param position: Event position.
          :returns: True is the given position collide this key, False otherwise.
          """
          return position[0] >= self.position[0] and position[0] <= self.position[0]+ self.size[0]