## 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
current[key] = {};
      }
      current = current[key];
    });
  }
  function createIsPathWhitelisted(key: string) {
    
    
    return function isPathWhitelisted(path: Array<string | number>): boolean {
      let current = currentlyInspectedPaths[key];
      if (!current) {
        return false;
      }
      for (let i = 0; i < path.length; i++) {
        current = current[path[i]];
        if (!current) {
          return false;
        }
      }
      return true;
    };
  }
  
  function getInstanceAndStyle(id: number): InstanceAndStyle {
    let instance = null;
    let style = null;
    const internalInstance = idToInternalInstanceMap.get(id);
    if (internalInstance != null) {
      instance = internalInstance._instance || null;
      const element = internalInstance._currentElement;