## The current behavior

The full value of the `key` is very difficult / impossible to find and use in the interface of the React Devtools.

![Kapture 2020-04-22 at 11 47 47](https://user-images.githubusercontent.com/1935696/79997715-25222680-84ba-11ea-97ba-51f1679a8c91.gif)

Only managed to find it by accident :(

## The expected behavior

The `key` is visible in the props list to the right.

### Detailed Proposal

As mentioned below in https://github.com/facebook/react/issues/18702#issuecomment-617924196

Add a light divider and new section in the props panel to the right.

Potentially also add a question mark that shows an explanation about the fact that things in this section are not really props.

Ref (Original implementation): https://github.com/facebook/react-devtools/pull/328
|};
const inProgressRequests: WeakMap<Element, InProgressRequest> = new WeakMap();
const resource: Resource<
  Element,
  Element,
  InspectedElementFrontend,
> = createResource(
  (element: Element) => {
    const request = inProgressRequests.get(element);
    if (request != null) {
      return request.promise;
    }
    let resolveFn = ((null: any): ResolveFn);
    const promise = new Promise(resolve => {
      resolveFn = resolve;
    });
    inProgressRequests.set(element, {promise, resolveFn});
    return promise;
  },
  (element: Element) => element,
  {useWeakMap: true},
);
type Props = {|
  children: React$Node,
|};
function InspectedElementContextController({children}: Props) {
  const bridge = useContext(BridgeContext);
  const store = useContext(StoreContext);
  const storeAsGlobalCount = useRef(1);