src/CFDIReader/CFDIReader.php
public function node(...$nodePath)
    {
        $node = $this->retrieveNode(...$nodePath);
        return (null === $node) ? null : clone $node;
    }
public function node(...$nodePath)
    {
        $node = $this->retrieveNode(...$nodePath);
        return (null === $node) ? null : clone $node;
    }
Return the node in the path inside the Comprobante
Returns null if the node does not exists
The node retrieved is always a copy

@param string[] ...$nodePath
@return SimpleXMLElement|null