## 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
if (nativeNodes !== null) {
      console.log('Nodes:', nativeNodes);
    }
    if (result.source !== null) {
      console.log('Location:', result.source);
    }
    if (window.chrome || /firefox/i.test(navigator.userAgent)) {
      console.log(
        'Right-click any value to save it as a global variable for further inspection.',
      );
    }
    if (supportsGroup) {
      console.groupEnd();
    }
  }
  function setInHook(
    id: number,
    index: number,
    path: Array<string | number>,
    value: any,
  ) {
    const fiber = findCurrentFiberUsingSlowPathById(id);
    if (fiber !== null) {
      if (typeof overrideHookState === 'function') {
        overrideHookState(fiber, index, path, value);
      }
    }
  }
  function setInProps(id: number, path: Array<string | number>, value: any) {
    const fiber = findCurrentFiberUsingSlowPathById(id);