PhpParser\PrettyPrinterAbstract::pImplode PHP Method

    protected function pImplode(array $nodes, $glue = '')
    {
        $pNodes = array();
        foreach ($nodes as $node) {
            if (null === $node) {
                $pNodes[] = '';
            } else {
                $pNodes[] = $this->p($node);
            }
        }
        return implode($glue, $pNodes);
    }