add ActionSheetRefObject type

index.tsx

@@ -1,3 +1,33 @@
 import ActionSheet from "./src/index";
 
+export type ActionSheetRefObject = {
+    /**
+          * Open or close the ActionSheet.
+          */
+     setModalVisible(visible?: boolean): void;
+
+     /**
+     * Open the Action Sheet.
+     */
+     show(): void;
+
+     /**
+     * Close the ActionSheet.
+     */
+     hide(): void;
+
+
+     /**
+      * Attach this to any child ScrollView Component's onScrollEndDrag, 
+      * onMomentumScrollEnd,onScrollAnimationEnd callbacks to handle the ActionSheet
+      * closing and bouncing back properly.
+      */
+     handleChildScrollEnd(): void;
+
+     /**
+      * Snap ActionSheet to given offset
+      */
+     snapToOffset(offset: number): void;
+}
+
 export default ActionSheet;