isKeyed()

True if maybeKeyed is a Collection.Keyed, or any of its subclasses.

isKeyed(maybeKeyed: unknown): boolean;

import { isKeyed, Map, List, Stack } from 'immutable';
isKeyed([]); // false
isKeyed({}); // false
isKeyed(Map()); // true
isKeyed(List()); // false
isKeyed(Stack()); // false