Callback object example has excess key

[agarb7]

Callback object example has excess myWebhook key:

myWebhook:
  'http://notificationServer.com?transactionId={$request.body#/id}&email={$request.body#/email}':
    post:
      # ...

But specification say that callback object is map where each value is a Path Item Object. Thereby the example must be without extra level:

'http://notificationServer.com?transactionId={$request.body#/id}&email={$request.body#/email}':
  post:
    # ...

[handrews]

It's actually correct, but it confused me as well (#3257). If you look under the Operation Object's fixed fields, the callbacks field is a map of Callback Objects, which are themselves maps of Path Item Objects.