import { CountRef, FilterTargetInternal, MultiTargetRef, SingleTargetRef } from './types.js';
export declare class TargetGuards {
    static isSingleTargetRef(target?: FilterTargetInternal): target is SingleTargetRef;
    static isMultiTargetRef(target?: FilterTargetInternal): target is MultiTargetRef;
    static isCountRef(target?: FilterTargetInternal): target is CountRef;
    static isProperty(target?: FilterTargetInternal): target is string;
    static isTargetRef(target?: FilterTargetInternal): target is SingleTargetRef | MultiTargetRef;
}