file/app/Utilities/Helpers/setting.php

<?php

use Illuminate\Support\Arr;

function setting($key) {
    // if the key that user provided not exists then null return
    $settings = $key != "" ? Arr::get(app()->settings, $key, null) : app()->settings;

    // if settings null means that key not found
    throw_if($settings === null, 'Exception', "Undefined enum '{$key}'");

    // if settings value is array its mean that user want to use it as collection
    return is_array($settings) ? collect($settings) : $settings;
}