## 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
removeRootPseudoKey(currentRootID);
        recordUnmount(current, false);
      }
    } else {
       M
      setRootPseudoKey(currentRootID, current);
      mountFiberRecursively(current, null, false, false);
    }
    if (isProfiling && isProfilingSupported) {
      const commitProfilingMetadata = ((rootToCommitProfilingMetadataMap: any): CommitProfilingMetadataMap).get(
        currentRootID,
      );
      if (commitProfilingMetadata != null) {
        commitProfilingMetadata.push(
          ((currentCommitProfilingMetadata: any): CommitProfilingData),
        );
      } else {
        ((rootToCommitProfilingMetadataMap: any): CommitProfilingMetadataMap).set(
          currentRootID,
          [((currentCommitProfilingMetadata: any): CommitProfilingData)],
        );
      }
    }
     W
    flushPendingEvents(root);
    if (traceUpdatesEnabled) {
      hook.emit('traceUpdates', traceUpdatesForNodes);
    }
    currentRootID = -1;
  }