## 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
version: string,
): {|
  getDisplayNameForFiber: getDisplayNameForFiberType,
  getTypeSymbol: getTypeSymbolType,
  ReactPriorityLevels: ReactPriorityLevelsType,
  ReactTypeOfSideEffect: ReactTypeOfSideEffectType,
  ReactTypeOfWork: WorkTagMap,
|} {
  const ReactTypeOfSideEffect: ReactTypeOfSideEffectType = {
    NoEffect: 0b00,
    PerformedWork: 0b01,
    Placement: 0b10,
  };
  
  
  
  
  
  
  
  const ReactPriorityLevels: ReactPriorityLevelsType = {
    ImmediatePriority: 99,
    UserBlockingPriority: 98,
    NormalPriority: 97,
    LowPriority: 96,
    IdlePriority: 95,
    NoPriority: 90,
  };