public function psr4()
    {
        $i = $this->load($this->composerPath . $this->psrFourName);

        if ($i !== false) {
            $this->log[] = 'Imported ' . $i . ' classes from psr4';
            return $i;
        }

        $this->log[] = 'Warn: psr4 not found';
        return false;
    }