## 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
((mostRecentlyInspectedElement: any): InspectedElement),
              path,
            ),
            createIsPathWhitelisted(null, secondaryCategory),
            path,
          ),
        };
      } else {
         I
         I
        return {
          id,
          type: 'no-change',
        };
      }
    } else {
      hasElementUpdatedSinceLastInspected = false;
      if (
        mostRecentlyInspectedElement === null ||
        mostRecentlyInspectedElement.id !== id
      ) {
        currentlyInspectedPaths = {};
      }
      mostRecentlyInspectedElement = inspectElementRaw(id);
      if (mostRecentlyInspectedElement === null) {
        return {
          id,
          type: 'not-found',
        };
      }