/**
* Return an iterable which emits file content bytes.
*
* @param int Offset for the start of data.
* @param int Offset for the end of data.
* @return Iterable Iterable object which emits requested data.
*/
public function getFileDataIterator($begin = null, $end = null)
{
$engine = $this->instantiateStorageEngine();
$raw_iterator = $engine->getRawFileDataIterator($this, $begin, $end);
$key = $this->getStorageFormat();
$format = id(clone PhabricatorFileStorageFormat::requireFormat($key))->setFile($this);
return $format->newReadIterator($raw_iterator);
}
