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<b>Warning</b>:  session_start(): open(/var/lib/php/sessions/sess_312bog4a3tt17n77gu99oe8tle, 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 />
// isTrue that, if passed a function, auto-calls it
// (for coroutines)
static boolean isTrue(O o) {
  if (o instanceof Boolean)
    ret ((Boolean) o).booleanValue();
  if (o == null) ret false;
  ret ((Boolean) callF(o)).booleanValue();
}

static bool isTrue(O pred, O arg) {
  ret booleanValue(callF(pred, arg));
}