def get_comments(self, issue_id):
        """Retrieve all the comments of a given issue.

        :param issue_id: ID of the issue
        """
        url = urijoin(self.base_url, self.RESOURCE, self.VERSION_API, self.ISSUE, issue_id, self.COMMENT)
        comments = self.get_items(DEFAULT_DATETIME, url, expand_fields=False)

        return comments