diff options
Diffstat (limited to 'web/src/lib.rs')
| -rw-r--r-- | web/src/lib.rs | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/web/src/lib.rs b/web/src/lib.rs index 3173e736..5a0dd6f2 100644 --- a/web/src/lib.rs +++ b/web/src/lib.rs @@ -19,7 +19,7 @@ pub trait UserInterface { fn update( &mut self, message: Self::Message, - ) -> Box<dyn Future<Item = Self::Message, Error = ()>>; + ) -> Option<Box<dyn Future<Output = Self::Message>>>; fn view(&mut self) -> Element<Self::Message>; |