basic layout edits

Summary: Include toggle button, trees/sidebar not separately interactive

Reviewed By: danielbuechele

Differential Revision: D8680613

fbshipit-source-id: 3bc52b66881abc56ea5cc0955f8237509d039fc4

src/fb-stubs/AXLayoutExtender.js

@@ -0,0 +1,25 @@
+/**
+ * Copyright 2018-present Facebook.
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ * @format
+ */
+
+import {Component} from 'react';
+import type {Element, ElementID, ElementSearchResultSet} from 'sonar';
+
+export class AXElementsInspector extends Component<{
+  onElementExpanded: (key: ElementID, deep: boolean) => void,
+  onElementSelected: (key: ElementID) => void,
+  onElementHovered: ?(key: ?ElementID) => void,
+  onValueChanged: ?(path: Array<string>, val: any) => void,
+  selected: ?ElementID,
+  searchResults?: ?ElementSearchResultSet,
+  root: ?ElementID,
+  elements: {[key: ElementID]: Element},
+  useAppSidebar?: boolean,
+}> {
+  render() {
+    return null;
+  }
+}