Function getWagtailMessage

getWagtailMessage(event: MessageEvent): null | WagtailMessage
Parses a message event that may contain a Wagtail message.
Parameters
- event: MessageEvent
  The message event to check for a Wagtail message.
Returns null | WagtailMessage
The Wagtail message if it exists, or null if it does not.
- Defined in utils/message.ts:62