Test passing CxxVector by reference from Rust to C
diff --git a/tests/ffi/lib.rs b/tests/ffi/lib.rs
index d6a94e4..750b30e 100644
--- a/tests/ffi/lib.rs
+++ b/tests/ffi/lib.rs
@@ -45,6 +45,7 @@
         fn c_take_unique_ptr_vector_u8(v: UniquePtr<CxxVector<u8>>);
         fn c_take_unique_ptr_vector_f64(v: UniquePtr<CxxVector<f64>>);
         fn c_take_unique_ptr_vector_shared(v: UniquePtr<CxxVector<Shared>>);
+        fn c_take_ref_vector(v: &CxxVector<u8>);
         fn c_take_vec_u8(v: &Vec<u8>);
         fn c_take_vec_shared(v: &Vec<Shared>);
         fn c_take_callback(callback: fn(String) -> usize);