From df92c633375f43d319d01792476e073df21b2c21 Mon Sep 17 00:00:00 2001
From: k-nasa <htilcs1115@gmail.com>
Date: Sat, 16 Nov 2019 00:29:54 +0900
Subject: [PATCH] fix: Add unstable features

---
 src/stream/stream/mod.rs | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/stream/stream/mod.rs b/src/stream/stream/mod.rs
index 2bef88f..bc2482d 100644
--- a/src/stream/stream/mod.rs
+++ b/src/stream/stream/mod.rs
@@ -1446,6 +1446,8 @@ extension_trait! {
             # }) }
             ```
         "#]
+        #[cfg(all(feature = "default", feature = "unstable"))]
+        #[cfg_attr(feature = "docs", doc(cfg(unstable)))]
         fn by_ref(&mut self) -> &mut Self {
             self
         }