Best way to have custom methods for vendor classes

Imagick.php

<?php

namespace MyStuff\Imagick;

/**
 * Option 1: My Imagick extending the original one with custom methods
 */
class Imagick extends \Imagick
{
    public function customMethod($param)
    {
        $this->doSomething($param);
    }
}

ImagickHelper.php

<?php

namespace MyStuff\Imagick;

/**
 * Option 2: ImagickHelper with custom static methods
 */
class ImagickHelper
{
    public static function customMethod(\Imagick $imagick, $param)
    {
        $imagick->doSomething($param);
    }
}

ImagickHelper2.php

<?php

namespace MyStuff\Imagick;

/**
 * Option 3: ImagickHelper with custom methods
 */
class ImagickHelper
{
    $this->$imagick;

    public function __construct(\Imagick $imagick)
    {
        $this->imagick = $imagick;
    }

    public function customMethod($param)
    {
        $this->imagick->doSomething($param);
    }
}