src/Provider/Node/FallbackNodeProvider.php
public function getNode()
    {
        foreach ($this->nodeProviders as $provider) {
            if ($node = $provider->getNode()) {
                return $node;
            }
        }

        return null;
    }
public function getNode()
    {
        foreach ($this->nodeProviders as $provider) {
            if ($node = $provider->getNode()) {
                return $node;
            }
        }

        return null;
    }
public function getNode ( ) { foreach ( $ this -> nodeProviders as $ provider ) { if ( $ node = $ provider -> getNode ( ) ) { return $ node ; } } return null ; }
Returns the system node ID by iterating over an array of node providers
and returning the first non-empty value found

@return string|null System node ID as a hexadecimal string
@throws \Exception
Returns the system node ID by iterating over an array of node providers and returning the first non - empty value found