public function render_footer_template() {
		$output = null;
		if ( ! empty( $this->footer ) ) {
			$output .= '<script type="text/html" id="' . esc_attr( $this->id() ) . '-footer-tmpl">';
			$output .= $this->footer->render();
			$output .= '</script>';
		}

		return $output;
	}