src/AbstractMessage.php
final public function isReplay($replay = null)
    {
        if (null === $replay) {
            if (null === $this->isReplay) {
                $this->isReplay = false;
            }
            return $this->isReplay;
        }

        if (null === $this->isReplay) {
            $this->isReplay = (bool) $replay;
            if ($this->isReplay) {
                $this->freeze();
            }
            return $this->isReplay;
        }

        throw new LogicException('You can only set the replay mode on one time.');
    }
final public function isReplay($replay = null)
    {
        if (null === $replay) {
            if (null === $this->isReplay) {
                $this->isReplay = false;
            }
            return $this->isReplay;
        }

        if (null === $this->isReplay) {
            $this->isReplay = (bool) $replay;
            if ($this->isReplay) {
                $this->freeze();
            }
            return $this->isReplay;
        }

        throw new LogicException('You can only set the replay mode on one time.');
    }
{@inheritdoc}