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<b>Warning</b>:  session_start(): open(/var/lib/php/sessions/sess_bk6ps7npfgorrqotjtu5tl6jef, O_RDWR) failed: No space left on device (28) in <b>/var/www/tb-usercake/models/config.php</b> on line <b>51</b><br />
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<b>Warning</b>:  session_start(): Failed to read session data: files (path: /var/lib/php/sessions) in <b>/var/www/tb-usercake/models/config.php</b> on line <b>51</b><br />
static S callAnswerMethod(O responder, S s) {
  ret callAnswerMethod(responder, s, litlist(s));
}

static S callAnswerMethod(O responder, S s, L<S> history) {
  S answer = (S) callOpt(responder, "answer", s, history);
  if (answer == null)
    answer = (S) callOpt(responder, "answer", s);
  return emptyToNull(answer);
}