niti: implements native `chdir` and `mkdir` with a return value

[nit.git] / lib / app / data_store.nit

diff --git a/lib/app/data_store.nit b/lib/app/data_store.nit
index afb6a1d..13891fc 100644 (file)
--- a/lib/app/data_store.nit
+++ b/lib/app/data_store.nit
@@ -34,5 +34,5 @@ interface DataStore
        fun [](key: String): nullable Object is abstract
 
        # Store `value` at `key`
-       fun []=(key: String, value: Serializable) is abstract
+       fun []=(key: String, value: nullable Serializable) is abstract
 end