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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def tap_and_hold(self, xcoord, ycoord):
 """ Touch down at given coordinates. :Args: - xcoord: X Coordinate to touch down. - ycoord: Y Coordinate to touch down. """

        self._actions.append(lambda: self._driver.execute(
            Command.TOUCH_DOWN, {
                'x': int(xcoord),
                'y': int(ycoord)}))
        return self