protected function provideBlockSchema()
    {
        $blockSchema = parent::provideBlockSchema();
        if ($this->File() && $this->File()->exists() && $this->File()->getIsImage()) {
            $blockSchema['fileURL'] = $this->File()->CMSThumbnail()->getURL();
            $blockSchema['fileTitle'] = $this->File()->getTitle();
        }
        return $blockSchema;
    }