import { MetaModel } from '../../main/models/metaModel';
import { Model } from '../../main/models/model';
import { DefinitionModel } from '../../main/models/definitionModel';
/**
 * This function can be used to let a value model extends another
 * value model or to let an object model extends another object model.
 * Notice that this function cannot be used with class model objects.
 * Notice that this extend function will not return a new model and
 * does change the model instance directly.
 *
 * Value models will inherit all the properties of another value model.
 * But it's able to overwrite properties.
 *
 * In the case of normal object models, the sub-model will inherit all properties,
 * with the possibility to overwrite them.
 * It also affects the prototype,
 * because the sub-object model prototype will get the super-model prototype as a prototype.
 * Also, the super-model constructor-functions will be called
 * before the constructor-functions of the sub-object model.
 * In addition, the convert-function will also be called
 * with the result of the super convert function.
 * @param subModel
 * @param superModel
 */
export declare function $extends<S extends Model>(subModel: S, superModel: Model): S extends DefinitionModel | MetaModel ? S : any;