import { ComparatorFn, MutationContext, SelectorFn } from '@collectable/core';
import { SortedSetStructure } from '../internals';
export declare function empty<T>(compare?: ComparatorFn<T>): SortedSetStructure<T>;
export declare function empty<T, K>(compare: ComparatorFn<K>, select: SelectorFn<T, K>): SortedSetStructure<T>;
export declare function empty<T>(mutable: boolean | MutationContext, compare?: ComparatorFn<T>): SortedSetStructure<T>;
export declare function empty<T, K>(mutable: boolean | MutationContext, compare: ComparatorFn<K>, select: SelectorFn<T, K>): SortedSetStructure<T>;