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-rw-r--r--src/dag_backend.rs6
1 files changed, 6 insertions, 0 deletions
diff --git a/src/dag_backend.rs b/src/dag_backend.rs
index 6a49146..8a74c7b 100644
--- a/src/dag_backend.rs
+++ b/src/dag_backend.rs
@@ -1,3 +1,9 @@
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at http://mozilla.org/MPL/2.0/.
+//
+
use anyhow::Result;
use async_trait::async_trait;