update todo

src/lib.rs

@@ -12,6 +12,7 @@
 // * Profile if inlining is worth it
 // * Add public `test` method to check if interface is implemented correctly
 // * Avoid clones in `Metadata` getters
+// * Blanket impl `*Interface` for Arc<T>, Mutex<T>, etc.?
 
 mod local_server;
 mod loop_status;