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-rw-r--r--third_party/nix/src/libexpr/attr-set.hh4
1 files changed, 4 insertions, 0 deletions
diff --git a/third_party/nix/src/libexpr/attr-set.hh b/third_party/nix/src/libexpr/attr-set.hh
index 832733365389..caddc6bebd61 100644
--- a/third_party/nix/src/libexpr/attr-set.hh
+++ b/third_party/nix/src/libexpr/attr-set.hh
@@ -33,6 +33,10 @@ class Bindings {
  public:
   typedef absl::btree_map<Symbol, Attr>::iterator iterator;
 
+  // Allocate a new attribute set that is visible to the garbage
+  // collector.
+  static Bindings* NewGC();
+
   // Return the number of contained elements.
   size_t size();