src/Parser.php
protected function normalizeKey($key)
    {
        if (null !== $this->keyNormalizer) {
            return call_user_func($this->keyNormalizer, $key);
        }

        return static::fixNodeName($key);
    }
protected function normalizeKey($key)
    {
        if (null !== $this->keyNormalizer) {
            return call_user_func($this->keyNormalizer, $key);
        }

        return static::fixNodeName($key);
    }
protected function normalizeKey ( $ key ) { if ( null !== $ this -> keyNormalizer ) { return call_user_func ( $ this -> keyNormalizer , $ key ) ; } return static :: fixNodeName ( $ key ) ; }
Normalize a node key

@param mixed $key

@return mixed
Normalize a node key