docs: def execute(self, env, args):
          """ Prints task information.
  
              `env`
                  Runtime ``Environment`` instance.
              `args`
                  Arguments object from arg parser.
              """
  
          start = self._fuzzy_time_parse(args.start)
          if not start:
              raise errors.FocusError(u'Invalid start period provided')
  
          stats = self._get_stats(env.task, start)
          self._print_stats(env, stats)