models/classes/runner/time/QtiTimeLine.php
public function unserialize($serialized)
    {
        $this->points = unserialize($serialized);
        if (!is_array($this->points)) {
            throw new InvalidDataException('The provided serialized data are invalid!');
        }
    }
public function unserialize($serialized)
    {
        $this->points = unserialize($serialized);
        if (!is_array($this->points)) {
            throw new InvalidDataException('The provided serialized data are invalid!');
        }
    }
Constructs the object
@link http://php.net/manual/en/serializable.unserialize.php
@param string $serialized <p>
The string representation of the object.
</p>
@return void
@since 5.1.0
@throws InvalidDataException