Codesleeve\Stapler\Attachment::setInstance PHP Method

    public function setInstance(StaplerableInterface $instance)
    {
        $this->instance = $instance;
    }

 /**
  * Build an attachment object.
  *
  * @param  \Codesleeve\Stapler\Interpolator
  * @return \Codesleeve\Stapler\Attachment
  */
 protected function build_attachment()
 {
     Stapler::boot();
     $instance = $this->build_mock_instance();
     $interpolator = new Interpolator();
     $attachmentConfig = new \Codesleeve\Stapler\AttachmentConfig('photo', ['styles' => [], 'placeholder_style' => 'original', 'url' => '/system/:attachment/:id_partition/:style/:filename', 'path' => ':app_root/public:url']);
     $imagine = m::mock('Imagine\\Image\\ImagineInterface');
     $resizer = new \Codesleeve\Stapler\File\Image\Resizer($imagine);
     $attachment = new \Codesleeve\Stapler\Attachment($attachmentConfig, $interpolator, $resizer);
     $attachment->setInstance($instance);
     $storageDriver = new \Codesleeve\Stapler\Storage\Filesystem($attachment);
     $attachment->setStorageDriver($storageDriver);
     return $attachment;
 }