import { Migrator } from './create-migrator';
import { Migration } from './types';
export interface MigrationDefinition<B, A> {
    match: string;
    migrator: Migrator<B, A>;
    versionAfterDowngrade: string;
    versionAfterUpgrade: string;
    unwrapMetadataAfterDowngrading?: boolean;
}
export declare function createMigration<B, A>(config: MigrationDefinition<B, A>): Migration;