Function standaloneAction

standaloneAction<FN>(actionName, fn): FN
Creates a standalone action. A standalone action must always take an existing tree node as first argument.
Type Parameters
- FN extends ((target: any, ...args: any[]) => any)
Parameters
- actionName: string
  Unique action name.
- fn: FN
  Function.
Returns FN
The function as an standalone action.