src/Environaut/Config/Reader/Dom/DomDocument.php
protected function refreshXpath()
    {
        unset($this->xpath);

        $this->xpath = new \DOMXPath($this);

        if ($this->isEnvironautDocument()) {
            $this->setDefaultNamespace(self::NAMESPACE_PREFIX, self::NAMESPACE_ENVIRONAUT_1_0);
        }
    }
protected function refreshXpath()
    {
        unset($this->xpath);

        $this->xpath = new \DOMXPath($this);

        if ($this->isEnvironautDocument()) {
            $this->setDefaultNamespace(self::NAMESPACE_PREFIX, self::NAMESPACE_ENVIRONAUT_1_0);
        }
    }
Re-instantiates the internal xpath instance and then
registers the Environaut config namespace if necessary.