## 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
return true;
          }
        }
      }
    }
    if (_debugSource != null && hideElementsWithPaths.size > 0) {
      const {fileName} = _debugSource;
       e
      for (const pathRegExp of hideElementsWithPaths) {
        if (pathRegExp.test(fileName)) {
          return true;
        }
      }
    }
    return false;
  }