import { isDeferred } from "https://deno.land/x/deco@1.57.30/engine/core/resolver.ts";
type
<T, TContext extends BaseContext = BaseContext>(f: Deferred<T, TContext> | unknown) => f is Deferred<T, TContext>
x/deco/engine/core/resolver.ts>isDeferred
import { isDeferred } from "https://deno.land/x/deco@1.57.30/engine/core/resolver.ts";