Is it possible to load a small part of a file?

I have the same question, but with regard to the Core API, rather than the Sync API. I need to be able to read the first few lines of a file, in order to decide whether it is appropriate to download. In the Android version of my app I can do this with the Core API by using the DropboxAPI.getFileStream method, and using the returned DropboxInputStream to read just the first bit (4k, in my case) of the file, and then closing the DropboxInputStream.  I can then examine the header information I have read, and if the file meets my conditions for downloading, I go ahead and download it using DropboxAPI.getFile.

I don't see any way in the iOS DropboxSDK world to do this kind of partial read. It looks like I am stuck with downloading the entire file with DBRestClient's loadFile:intoPath: method.  Am I missing something here?