available methods in form request

FormRequest.php

<?php namespace App\Http\Requests\Admin;

use Illuminate\Foundation\Http\FormRequest;

class UpdateBoosterFormRequest extends FormRequest
{
    protected $errorBag = 'edit';

    /**
     * Determine if the user is authorized to make this request.
     *
     * @return bool
     */
    public function authorize()
    {
        return auth()->check();
    }

    /**
     * Get the validation rules that apply to the request.
     *
     * @return array
     */
    public function rules()
    {
        return [
            'nickname' => 'different:summoner',
        ];
    }

    /**
     * @return string
     */
    protected function getRedirectUrl()
    {
        $booster = $this->route('booster');
        return route('admin.boosters.show', [$booster, 'show' => 'edit']);
    }
    
     /**
     * @return array
     */
    public function messages()
    {
        return [
            'is_physical.required_without' => 'Debe escoger al menos un tipo',
            'is_virtual.required_without' => 'Debe escoger al menos un tipo'
        ];
    }
}