announce only to those behind

1 files changed, 5 insertions, 0 deletions

diff --git a/src/document/sync.rs b/src/document/sync.rs
index 8c04632..e3ff157 100644
--- a/src/document/sync.rs
+++ b/src/document/sync.rs
@@ -28,6 +28,11 @@ impl Received {
         !self.0.changes.is_empty()
     }
 
+    /// The sender's heads, as it says.
+    pub(crate) fn heads(&self) -> &[crate::document::ChangeHash] {
+        &self.0.heads
+    }
+
     /// The bytes of the changes it carries, and of its bloom filters (`have`).
     pub(crate) fn sizes(&self) -> (usize, usize) {
         let changes = self.0.changes.iter().map(<[u8]>::len).sum();