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-rw-r--r--src/util/crdt/map.rs1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/util/crdt/map.rs b/src/util/crdt/map.rs
index 7553cd50..ad9a6e55 100644
--- a/src/util/crdt/map.rs
+++ b/src/util/crdt/map.rs
@@ -33,6 +33,7 @@ where
/// This can be used to build a delta-mutator:
/// when merged with another map, the value will be added or CRDT-merged if a previous
/// value already exists.
+ #[must_use = "CRDT mutators are meant to be merged into a CRDT and not ignored."]
pub fn put_mutator(k: K, v: V) -> Self {
Self { vals: vec![(k, v)] }
}