Neos\Flow\ResourceManagement\Streams\StreamWrapperInterface::tell PHP Method

    public function tell();

 /**
  * Retrieve the current position of a stream.
  *
  * This method is called in response to ftell().
  *
  * @return int Should return the current position of the stream.
  */
 public function stream_tell()
 {
     return $this->streamWrapper->tell();
 }