import { GetMapper, DatabaseObject } from 'database-builder';
import { DatabaseResettableContract } from './database-resettable-contract';
import { Observable } from 'rxjs';
import { Version } from '../model/version-model';
export declare abstract class DatabaseMigrationContract {
    onStart(): void;
    onFinish(): void;
    onProgress(): void;
    abstract to(version: Version, database: DatabaseObject, mappers: GetMapper, resettable: DatabaseResettableContract): Array<Observable<any>>;
}