add todo

src/bag.rs

@@ -14,6 +14,8 @@ impl Bag {
     pub fn open<P: AsRef<Path>>(path: P) -> Result<Self> {
         let bag_file = File::open(path).wrap_err("could not open bag file")?;
         let mut reader = MmapReader::map(bag_file).wrap_err("could not map bag file memory")?;
+
+        // TODO: support unindexed bags
         let index = BagIndex::read(&mut reader).wrap_err("error reading bag index")?;
         Ok(Bag { reader, index })
     }