import { Record } from "../interfaces/dataUnit.js";
import { FieldDescriptor } from '../metadata/UnitMetadata.js';
export declare class FieldComparator {
    static compare(field: FieldDescriptor, recordA: Record, recordB: Record, asc?: boolean, onlyLabel?: boolean): number;
    static compareValues(descriptor: FieldDescriptor, valueA: any, valueB: any, onlyLabel?: boolean): number;
    static compareUndefined(isUndefinedA: boolean, isUndefinedB: boolean): number | undefined;
}