export declare class DatabaseSchemaTooNewError extends Error {
    readonly dbVersion: number;
    readonly appVersion: number;
    constructor(dbVersion: number, appVersion: number);
}
export declare class DatabaseSchemaMigrationGapError extends Error {
    readonly dbVersion: number;
    readonly appVersion: number;
    readonly missingVersion: number;
    constructor(dbVersion: number, appVersion: number, missingVersion: number);
}