diff --git a/src/dom.rs b/src/dom.rs
index 635e42a..b1b6062 100644
--- a/src/dom.rs
+++ b/src/dom.rs
@@ -1,4 +1,5 @@
use std::pin::Pin;
+use std::borrow::BorrowMut;
use std::convert::AsRef;
use std::future::Future;
use std::task::{Context, Poll};
@@ -264,6 +265,7 @@ fn create_element_ns(name: &str, namespace: &str) -> A where A: JsCast {
}
+// TODO should this inline ?
fn set_option(element: A, callbacks: &mut Callbacks, value: D, mut f: F)
where A: 'static,
C: OptionStr