From 6be7eee754d864f6c9f76dc277677a470d51e2fc Mon Sep 17 00:00:00 2001
From: satellitex <s1220245@u-aizu.ac.jp>
Date: Wed, 1 May 2019 16:50:12 +0900
Subject: [PATCH] add btree_set with std (#2444)

---
 substrate/core/sr-std/with_std.rs | 1 +
 1 file changed, 1 insertion(+)

diff --git a/substrate/core/sr-std/with_std.rs b/substrate/core/sr-std/with_std.rs
index 9d8a7342f3..9bf49ce6ed 100644
--- a/substrate/core/sr-std/with_std.rs
+++ b/substrate/core/sr-std/with_std.rs
@@ -35,4 +35,5 @@ pub use std::result;
 
 pub mod collections {
 	pub use std::collections::btree_map;
+	pub use std::collections::btree_set;
 }