def release_to_branch(self, release_id):
self.ensure_release_scheme('<STR_LIT>')<EOL>return self.releases[release_id].revision.branch<EOL>
Shortcut to translate a release identifier to a branch name.

:param release_id: A :attr:`Release.identifier` value (a string).
:returns: A branch name (a string).
:raises: :exc:`~exceptions.TypeError` when :attr:`release_scheme` isn't
         'branches'.