export declare const ComparisonFunctions: {
    /**
     * Arithmetic and comparison operators
     */
    $lt: (a: any, b: any) => boolean;
    $lte: (a: any, b: any) => boolean;
    $gt: (a: any, b: any) => boolean;
    $gte: (a: any, b: any) => boolean;
    $ne: (a: any, b: any) => boolean;
    $in: (a: any, b: any) => boolean;
    $nin: (a: any, b: any) => boolean;
    $regex: (a: any, b: any) => boolean;
    $exists: (value: any, exists: any) => any;
    $size: (obj: any, value: any) => boolean;
    $elemMatch: (obj: any, value: any) => boolean;
};