public static function handleCasByKey($memcached, $casToken, $serverKey, $key)
    {
        return [
            'attributes' => [
                'casToken' => $casToken,
                'serverKey' => $serverKey,
                'key' => $key
            ],
            'kind' => Span::KIND_CLIENT
        ];
    }
public static function handleCasByKey($memcached, $casToken, $serverKey, $key)
    {
        return [
            'attributes' => [
                'casToken' => $casToken,
                'serverKey' => $serverKey,
                'key' => $key
            ],
            'kind' => Span::KIND_CLIENT
        ];
    }
public static function handleCasByKey ( $ memcached , $ casToken , $ serverKey , $ key ) { return [ 'attributes' => [ 'casToken' => $ casToken , 'serverKey' => $ serverKey , 'key' => $ key ] , 'kind' => Span :: KIND_CLIENT ] ; }
Handle converting the key and check and set token to attributes

@internal
@param \Memcached $memcached
@param string $casToken The check and set token. Unique value associated with the existing item. Generated by
memcache.
@param string $serverKey The key identifying the server to store the value on or retrieve it from.
@param string $key The key or keys to operate on
@return array

@access private
Handle converting the key and check and set token to attributes