Laravel - Boolean toggle trait

ToggleTrait.php

<?php namespace App\Traits;

trait ToggleTrait
{

    public function toggle($values, $bool = null)
    {
        if(is_string($values))
        {
            $values = [$values];
        }

        foreach($values as $value)
        {
            $data[$value] = ($bool != null ? $bool : !$this->$value);
        }

        return $this->update($data);
    }

}