code: def path(self, which=None):
          
          if which and which.startswith('content_'):
              return '{0}/content/{1}'.format(
                  super(Capsule, self).path(which='self'),
                  which.split('content_')[1]
              )
          return super(Capsule, self).path(which)
docs: Extend ``nailgun.entity_mixins.Entity.path``.
  
          The format of the returned path depends on the value of ``which``:
  
          content_lifecycle_environments
              /capsules/<id>/content/lifecycle_environments
          content_sync
              /capsules/<id>/content/sync
  
  
          ``super`` is called otherwise.