diff --git a/src/visibility.rs b/src/visibility.rs
index 8027078..1af14f0 100644
--- a/src/visibility.rs
+++ b/src/visibility.rs
@@ -75,7 +75,7 @@ fn add_visibility_indices(
     }
 }
 
-struct VisibilityGrid<'a, F>(&'a Map, F);
+pub struct VisibilityGrid<'a, F>(pub &'a Map, pub F);
 
 impl<'a, F> InputGrid for VisibilityGrid<'a, F>
 where