async function - nberlette/is GitHub Wiki
function isAsyncFunction<T = any>(it: unknown): it is AsyncFunction<T>;-
TReturn(default:any)
<T extends TReturn = TReturn>(...args: any[]): Promise<T>;readonly [Symbol.toStringTag]: "AsyncFunction";function isAsyncFunction<T = any>(it: unknown): it is AsyncFunction<T>;TReturn (default: any)<T extends TReturn = TReturn>(...args: any[]): Promise<T>;readonly [Symbol.toStringTag]: "AsyncFunction";