- protected static final ListenableFuture<Void> IMMEDIATE_VOID_SUCCESS = Futures.immediateFuture(null);
- protected static final ListenableFuture<Boolean> IMMEDIATE_BOOLEAN_SUCCESS = Futures.immediateFuture(Boolean.TRUE);
+ protected static final @NonNull ListenableFuture<Empty> IMMEDIATE_EMPTY_SUCCESS =
+ Futures.immediateFuture(Empty.value());
+ protected static final @NonNull ListenableFuture<Boolean> IMMEDIATE_BOOLEAN_SUCCESS =
+ Futures.immediateFuture(Boolean.TRUE);