Variable register

register: (kind: string, fn: OperationHandler) => void = ...

Type Declaration

- (kind: string, fn: OperationHandler): void
- Registers the handler for one kind of operation.
  
  A handler may return a value or a promise.
  Parameters
  - kind: string
    the operation's name
  - fn: OperationHandler
    the handler
  Returns void
  
  Throws
  an Error when fn is not a function or the kind is already registered