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-rw-r--r--src/libstore/store.hh4
1 files changed, 4 insertions, 0 deletions
diff --git a/src/libstore/store.hh b/src/libstore/store.hh
index 239493a88b3f..8f5190f804c5 100644
--- a/src/libstore/store.hh
+++ b/src/libstore/store.hh
@@ -84,6 +84,10 @@ void setReferences(const Transaction & txn, const Path & storePath,
    result is not cleared. */
 void queryReferences(const Path & storePath, PathSet & references);
 
+/* Queries the set of incoming FS references for a store path.  The
+   result is not cleared. */
+void queryReferers(const Path & storePath, PathSet & referers);
+
 /* Constructs a unique store path name. */
 Path makeStorePath(const string & type,
     const Hash & hash, const string & suffix);