Remove StoreInner from pub and expose is_empty

plugins/store/src/store.rs

@@ -268,7 +268,7 @@ enum AutoSaveMessage {
 }
 
 #[derive(Clone)]
-pub struct StoreInner<R: Runtime> {
+struct StoreInner<R: Runtime> {
     app: AppHandle<R>,
     path: PathBuf,
     cache: HashMap<String, JsonValue>,
@@ -515,6 +515,11 @@ impl<R: Runtime> Store<R> {
         self.store.lock().unwrap().len()
     }
 
+    /// Returns true if the store contains no elements.
+    pub fn is_empty(&self) -> bool {
+        self.store.lock().unwrap().is_empty()
+    }
+
     /// Update the store from the on-disk state
     pub fn load(&self) -> crate::Result<()> {
         self.store.lock().unwrap().load()