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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 pass_to_pipeline_if_article( self, response, source_domain, original_url, rss_title=None ):
 """ Responsible for passing a NewscrawlerItem to the pipeline if the response contains an article. :param obj response: the scrapy response to work on :param str source_domain: the response's domain as set for the crawler :param str original_url: the url set in the json file :param str rss_title: the title extracted by an rssCrawler :return NewscrawlerItem: NewscrawlerItem to pass to the pipeline """

        if self.helper.heuristics.is_article(response, original_url):
            return self.pass_to_pipeline(
                response, source_domain, rss_title=None)