code: def update_intervals(self, back=None):
          '''
          Return the update intervals for all of the enabled fileserver backends
          which support variable update intervals.
          '''
          back = self.backends(back)
          ret = {}
          for fsb in back:
              fstr = '{0}.update_intervals'.format(fsb)
              if fstr in self.servers:
                  ret[fsb] = self.servers[fstr]()
          return ref update_intervals(self, back=None):
          '''
          Return the update intervals for all of the enabled fileserver backends
          which support variable update intervals.
          '''
          back = self.backends(back)
          ret = {}
          for fsb in back:
              fstr = '{0}.update_intervals'.format(fsb)
              if fstr in self.servers:
                  ret[fsb] = self.servers[fstr]()
          return ret
docs: Return the update intervals for all of the enabled fileserver backends
          which support variable update intervals.