/**
 * Classify a set of items into 2 groups
 * @param iterable List of items
 * @param predicate Function that classifies item
 * @returns A tuple of 2 item groups
 *   - First group includes items that `predicate` returns `true`
 *   - Second group includes items that `predicate` returns `false`
 */
export declare function partition<Item>(iterable: Iterable<Item>, predicate: (item: Item) => boolean): [Item[], Item[]];
/**
 * Like `partition` but with type predicate
 */
export declare const partitionPredicate: {
    /**
     * Classify a set of items into 2 groups
     * @param iterable List of items
     * @param predicate Function that classifies item
     * @returns A tuple of 2 item groups
     *   - First group includes items that `predicate` returns `true`
     *   - Second group includes items that `predicate` returns `false`
     */
    <Type, Subtype extends Type>(iterable: Iterable<Type>, predicate: (item: Type) => item is Subtype): [Subtype[], Type[]];
};