<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def url_converter(self, *args, **kwargs):
 """ Return the custom URL converter for the given file name. """

        upstream_converter = super(PatchedManifestStaticFilesStorage, self).url_converter(*args, **kwargs)

        def converter(matchobj):
            try:
                upstream_converter(matchobj)
            except ValueError:
                # e.g. a static file 'static/media/logo.6a30f15f.svg' could not be found
                # because the upstream converter stripped 'static/' from the path
                matched, url = matchobj.groups()
                return matched

        return converter