import { Model } from "sequelize-typescript";
export declare namespace LockableHelper {
    type LockableModel = Model & {
        locked: string;
    };
    function beforeSave(instance: LockableModel, allowedColumnsThatCanChangeWhenLocked?: string[]): Promise<void>;
    function beforeUpdateOptions(instance: LockableModel, hasChanges?: boolean): Promise<void>;
    function beforeDestroy(instance: LockableModel): Promise<void>;
}