Return immediately if no image found

        Args:
            - pattern (str or Pattern): filename or an opencv image object.
            - action (str): click or long_click

        Returns:
            Click point or None

def click_nowait(self, pattern, action='click', desc=None, **match_kwargs):
        """ Return immediately if no image found

        Args:
            - pattern (str or Pattern): filename or an opencv image object.
            - action (str): click or long_click

        Returns:
            Click point or None
        """
        point = self.match(pattern, **match_kwargs)
        if not point or not point.matched:
            return None

        func = getattr(self, action)
        func(*point.pos)
        return point