docs: def x(self):
          """Call self.log_func(self) and return expect_string."""
          self._log_after_del = False
          passed_string = self.string
          if self.log_func:
              self.log_func(self)
          else:
              print_info(
                  "Timer [%(passed)s]: %(name)s, start at %(start)s."
                  % (
                      dict(
                          name=self.name, start=ttime(self.start_at), passed=passed_string
                      )
                  )
              )
          return passed_string