@interface CRKChunkedFile : NSObject { int mFileDescriptor; } + (void)assertFileDescriptorIsValid:(int)a0; + (long long)preferredChunkSizeForFileDescriptor:(int)a0; - (id)init; - (id)initWithFileDescriptor:(int)a0; - (long long)readNextChunkIntoBuffer:(id)a0 error:(id *)a1; @end