Laravel 5.4中的多个Form :: select中的默认值

Question

I use Laravel 5.4 with Collective\Html package.

I try to build a form with multiple select element and set a default values for it.

My form.blade.php file

{!! Form::open(['url'=>'', 'method'=>'GET']) !!}

    {!! Form::select(
        "fruits[]",
        [1=>"apple", 2=>"peer", 3=>"banana"],
        [1, 3],
        ["multiple"=>true]
        );
    !!}

    ...

{!! Form::close() !!}

This code works fine and I see multi-line select element with selected first and third lines.

But if I send to this page GET data through url like /form?fruits[]=2&fruits[]=3 pre-selected valued are not available any more.

As far as I understand, the reason is in Collective\Html\FormBuilder class. Beginning from v5.2 following code was added to the getValueAttribute() method (lines 1163-1166 at v.5.4):

$request = $this->request($name);
if (!is_null($request)) {
    return $request;
}

This code returns and overrides default values from Form::select() and takes needed values from the request. It is nice, but looks like developers do not have a full control under select element after this update.

After some manipulations in the FormBuilder class, default values are sent to the getSelectedValue() method, which set 'selected' attribute for needed options in select element (lines 762-764)

if (is_array($selected)) {
    return in_array($value, $selected, true) ? 'selected' : null;
//--------------------------------------^-----------------
//-------------------------------problem origin-----------
}

Here in_array looks for option value ($value) in default values from url ($selected). As far values from url are strings and $value is integer FormBuilder does not find default options at all.

How to set default values without editing source class? Should I override HtmlServiceProvider, HtmlBuilder and FormBuilder classes just to remove true parameter?

Maybe there is some more native way to set default values?

Thanks in advance for your answers.