function types.isSet Usage in Denoimport { types } from "node:util"; isSet<T>(object: T | { }): object is T extends ReadonlySet<any> ? (unknown extends T ? never : ReadonlySet<any>) : Set<unknown> Returns true if the value is a built-in Set instance. util.types.isSet(new Set()); // Returns true Type Parameters T Parameters object: T | { } Return Type object is T extends ReadonlySet<any> ? (unknown extends T ? never : ReadonlySet<any>) : Set<unknown>