code: def click_a_point(self, x=0, y=0, duration=100):
          
          self._info("Clicking on a point (%s,%s)." % (x,y))
          driver = self._current_application()
          action = TouchAction(driver)
          try:
              action.press(x=float(x), y=float(y)).wait(float(duration)).release().perform()
          except:
              assert False, "Can't click on a point at (%s,%s)" % (x,y)
docs: Click on a point