<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def _get_url(self, path, base=JIRA_BASE_URL):
 """ Returns the full url based on JIRA base url and the path provided :param path: The subpath desired. :type path: str :param base: The base url which should be prepended to the path :type base: Optional[str] :return Fully qualified URL :rtype: str """

        options = self._options.copy()
        options.update({'path': path})
        return base.format(**options)