diff --git a/lib/storage_provider.dart b/lib/storage_provider.dart
new file mode 100644
index 0000000..1d3747e
--- /dev/null
+++ b/lib/storage_provider.dart
@@ -0,0 +1,4 @@
+abstract class StorageProvider {
+  /// Allow to sync the first value.
+  void syncFirst();
+}