protected function getAnyKey(array $keys)
    {
        foreach($keys as $key)
        {
            $value = $this->getValue($key);

            if(!is_null($value))
            {
                return $value;
            }
        }
    }
protected function getAnyKey(array $keys)
    {
        foreach($keys as $key)
        {
            $value = $this->getValue($key);

            if(!is_null($value))
            {
                return $value;
            }
        }
    }
protected function getAnyKey ( array $ keys ) { foreach ( $ keys as $ key ) { $ value = $ this -> getValue ( $ key ) ; if ( ! is_null ( $ value ) ) { return $ value ; } } }
Get value of first key that exists in Response

@param       array                   $keys       Given keys

@return      string|integer|null                 Value of first found key or null if all keys does not exists
Get value of first key that exists in Response