1 files changed, 4 insertions, 1 deletions

diff --git a/crates/ra_arena/src/lib.rs b/crates/ra_arena/src/lib.rs
index 1c97c2662..26641e690 100644
--- a/crates/ra_arena/src/lib.rs
+++ b/crates/ra_arena/src/lib.rs
@@ -71,12 +71,15 @@ impl<ID: ArenaId, T> Arena<ID, T> {
     pub fn len(&self) -> usize {
         self.data.len()
     }
+    pub fn is_empty(&self) -> bool {
+        self.data.is_empty()
+    }
     pub fn alloc(&mut self, value: T) -> ID {
         let id = RawId(self.data.len() as u32);
         self.data.push(value);
         ID::from_raw(id)
     }
-    pub fn iter<'a>(&'a self) -> impl Iterator<Item = (ID, &'a T)> {
+    pub fn iter(&self) -> impl Iterator<Item = (ID, &T)> {
         self.data.iter().enumerate().map(|(idx, value)| (ID::from_raw(RawId(idx as u32)), value))
     }
 }