models/common/Define/Model.php

<?php
namespace ProVM\Common\Define;

use ProVM\Common\Factory\Model as ModelFactory;

interface Model {
  public function getTable(): string;
  public function setFactory(ModelFactory $factory): Model;
  public function parentOf(string $child_model_class, array $relation_definitions): ?array;
  public function childOf(string $parent_model_class, array $relation_definitions): ?Model;
  public function siblingOf(string $sibling_model_class, string $connecting_table, array $relation_definitions): ?array;

  public function toArray(): array;
}