Touch down at given coordinates.

        :Args:
         - xcoord: X Coordinate to touch down.
         - ycoord: Y Coordinate to touch down.

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