Mutagenesis\Runner\RunnerAbstract::getBootstrap PHP Method

    public function getBootstrap()
    {
        if (is_null($this->_bootstrap)) {
            if (file_exists($this->getTestDirectory() . '/TestHelper.php')) {
                return $this->getTestDirectory() . '/TestHelper.php';
            } elseif (file_exists($this->getTestDirectory() . '/Bootstrap.php')) {
                return $this->getTestDirectory() . '/Bootstrap.php';
            }
        }
        return $this->_bootstrap;
    }