src/Traits/Resizable.php
public function thumbnail($type, $attribute = 'image')
    {
        // Return empty string if the field not found
        if (!isset($this->attributes[$attribute])) {
            return '';
        }

        // We take image from posts field
        $image = $this->attributes[$attribute];

        return $this->getThumbnail($image, $type);
    }
public function thumbnail($type, $attribute = 'image')
    {
        // Return empty string if the field not found
        if (!isset($this->attributes[$attribute])) {
            return '';
        }

        // We take image from posts field
        $image = $this->attributes[$attribute];

        return $this->getThumbnail($image, $type);
    }
Method for returning specific thumbnail for model.

@param string $type
@param string $attribute

@return string