@property
    def preview_url_template(self):
        return utils.convert_png_to_data_url(os.path.join(
            feconf.RTE_EXTENSIONS_DIR, self.id, '%sPreview.png' % self.id))
Returns a URL template which can be interpolated to a URL for the
dataset/ETHPy150Open oppia/oppia/extensions/rich_text_components/base.py/BaseRichTextComponent.preview_url_template