Function removeMessageHook

removeMessageHook(handler: IMessageHandler, hook: MessageHook): void
Remove an installed message hook for a message handler.
Parameters
- handler: IMessageHandler
  The message handler of interest.
- hook: MessageHook
  The message hook to remove.
  
  Notes
  It is safe to call this function while the hook is executing.
  
  If the hook is not installed, this is a no-op.
Returns void
- Defined in node_modules/@lumino/messaging/types/index.d.ts:225