export type SelectionEquals<T> = (value: T, element: T) => boolean;
export declare class SelectionSet<T> {
    readonly values: T[];
    private readonly equals;
    constructor(values?: T[], equals?: SelectionEquals<T>);
    get size(): number;
    get isEmpty(): boolean;
    contains(value: T): boolean;
    containsAll(values: T[]): boolean;
    containsAny(values: T[]): boolean;
    select(value: T): SelectionSet<T>;
    unselect(value: T): SelectionSet<T>;
    toggle(value: T): SelectionSet<T>;
    toggleAll(values: T[]): SelectionSet<T>;
    refresh(values: T[]): SelectionSet<T>;
    clear(): SelectionSet<T>;
    private clone;
    private includes;
    private exclude;
}