Pchp.Library.Arrays.PrepareWalk C# (CSharp) Method

        private static PhpValue[] PrepareWalk(IDictionary array, IPhpCallable callback, PhpValue data)
        {
            if (callback == null)
            {
                //PhpException.ArgumentNull("callback");
                // return null;
                throw new ArgumentNullException(nameof(callback));
            }

            if (array == null)
            {
                //PhpException.ArgumentNull("array");
                //return null;
                throw new ArgumentNullException(nameof(array));
            }

            // prepares an array of callback's arguments (no deep copying needed because it is done so in callback):
            return (data != null)
                ? new PhpValue[] { PhpValue.CreateAlias(), PhpValue.Null, data }
                : new PhpValue[] { PhpValue.CreateAlias(), PhpValue.Null };
        }