code: def branches(self):
          
          # Make sure the local repository exists.
          self.create()
          # Create a mapping of branch names to revisions.
          return dict((r.branch, r) for r in self.find_branches())
docs: A dictionary that maps branch names to :class:`Revision` objects.
  
          Here's an example based on a mirror of the git project's repository:
  
          >>> from pprint import pprint
          >>> from vcs_repo_mgr.backends.git import GitRepo
          >>> repository = GitRepo(remote='https://github.com/git/git.git')
          >>> pprint(repository.branches)
          {'maint':  Revision(repository=GitRepo(...), branch='maint',  revision_id='16018ae'),
           'master': Revision(repository=GitRepo(...), branch='master', revision_id='8440f74'),
           'next':   Revision(repository=GitRepo(...), branch='next',   revision_id='38e7071'),
           'pu':     Revision(repository=GitRepo(...), branch='pu',     revision_id='d61c1fa'),
           'todo':   Revision(repository=GitRepo(...), branch='todo',   revision_id='dea8a2d')}