export default class MinimongoSorter {
    private _sortSpecParts;
    private _sortFunction;
    private _keyComparator;
    private _selectorForAffectedByModifier;
    constructor(spec: any);
    affectedByModifier(modifier: any): boolean;
    getComparator(options?: any): (a: any, b: any) => number;
    _compareKeys(key1: any, key2: any): number;
    _generateKeysFromDoc(doc: any, cb: any): void;
    _getBaseComparator(): (a: any, b: any) => number | null;
    _getMinKeyFromDoc(doc: any): any;
    _getPaths(): string[];
    _keyFieldComparator(i: number): (key1: any, key2: any) => any;
    combineIntoProjection: (projection: any) => {};
}