import * as mongo from "mongodb";
export type Condition<T> = {
    $eq?: T;
    $gt?: T;
    $gte?: T;
    $in?: T[];
    $lt?: T;
    $lte?: T;
    $ne?: T;
    $nin?: T[];
    $isset?: boolean;
    $elemMatch?: Condition<Partial<T>>;
};
export declare namespace Condition {
    function is(value: any | Condition<any>): value is Condition<any>;
    function toMongo<T>(condition: Condition<T>): mongo.FilterOperators<T> | any;
    function extract<T>(condition: Condition<T> | any): Condition<T> | undefined;
}