protected override void ProcessItem(JsValue[] args, JsValue currentValue)
{
_index++;
var sourceValue = ExtractValueFromIteratorInstance(currentValue);
JsValue jsValue;
if (!ReferenceEquals(_callable, null))
{
args[0] = sourceValue;
args[1] = _index;
jsValue = _callable.Call(_thisArg, args);
}
else
{
jsValue = sourceValue;
}
_instance.Set((uint)_index, jsValue, updateLength: false, throwOnError: true);
}
