public function test_toEloquent()
 {
     $this->assertEquals(EloquentCollection::class, get_class(with(new Collection())->toEloquent()));
     $c = new Collection([['id' => 1, 'name' => 'Hello'], ['id' => 2, 'name' => 'World']]);
     $this->assertEquals([], $c->toEloquent()->all());
     $c = new Collection([[new CustomModel()], ['foo'], 'bar', new CustomModel()]);
     $this->assertEquals([3 => new CustomModel()], $c->toEloquent()->all());
 }