import { OplogObserveDriver } from "../mongo/oplog-observe-driver";
export declare class _WriteFence {
    fired: boolean;
    _oplogObserveDrivers: Record<string, OplogObserveDriver>;
    private armed;
    private retired;
    private outstanding_writes;
    private before_fire_callbacks;
    private completion_callbacks;
    constructor();
    static _CurrentWriteFence: _WriteFence;
    beginWrite(): {
        committed: () => void;
    };
    arm(): void;
    onBeforeFire(func: any): void;
    onAllCommitted(func: any): void;
    _maybeFire(): void;
    retire(): void;
}