type OpenStrategyFunction = (data: {
    id: unknown;
    value: boolean;
    opened: Set<unknown>;
    children: Map<unknown, unknown[]>;
    parents: Map<unknown, unknown>;
    event?: Event;
}) => Set<unknown>;
type OpenSelectStrategyFunction = (data: {
    id: unknown;
    value: boolean;
    opened: Set<unknown>;
    selected: Map<unknown, 'on' | 'off' | 'indeterminate'>;
    children: Map<unknown, unknown[]>;
    parents: Map<unknown, unknown>;
    event?: Event;
}) => Set<unknown> | null;
export type OpenStrategy = {
    open: OpenStrategyFunction;
    select: OpenSelectStrategyFunction;
};
export declare const singleOpenStrategy: OpenStrategy;
export declare const multipleOpenStrategy: OpenStrategy;
export declare const listOpenStrategy: OpenStrategy;