Move workspace crates into subfolder

crates/disk/src/binnedstream.rs

@@ -0,0 +1,27 @@
+use err::Error;
+use futures_util::Stream;
+use futures_util::StreamExt;
+use std::pin::Pin;
+use std::task::{Context, Poll};
+
+// TODO remove after refactor.
+pub struct BoxedStream<I> {
+    inp: Pin<Box<dyn Stream<Item = I> + Send>>,
+}
+
+impl<I> BoxedStream<I> {
+    pub fn new<T>(inp: T) -> Result<Self, Error>
+    where
+        T: Stream<Item = I> + Send + 'static,
+    {
+        Ok(Self { inp: Box::pin(inp) })
+    }
+}
+
+impl<I> Stream for BoxedStream<I> {
+    type Item = I;
+
+    fn poll_next(mut self: Pin<&mut Self>, cx: &mut Context) -> Poll<Option<Self::Item>> {
+        self.inp.poll_next_unpin(cx)
+    }
+}