def METHOD_NAME(self):
    self._assert_completions_not_offered('$R_', '$R_* (received time)')
    self._assert_completions_not_offered('${R_', '${R_*} (received time)')
    self._assert_completions_not_offered('$S_', '$S_* (stamp in message)')
    self._assert_completions_not_offered('${S_}', '${S_*} (stamp in message)')
    self._assert_completions_not_offered('$C_', '$C_* (current time)')
    self._assert_completions_not_offered('${C_', '${C_*} (current time)')