use Bitrix\Main\Page\Asset;

Asset::getInstance()->addCss(
    '/local/css/sabon-product-cta.css'
);

Asset::getInstance()->addJs(
    '/local/js/sabon-product-cta.js'
);<pre>[RuntimeException] 
Could not start session because headers have already been sent. &quot;/home/s/sabon/sabon/public_html/local/php_interface/init.php&quot;:1. (0)
/home/s/sabon/sabon/public_html/bitrix/modules/main/lib/Session/Session.php:143
#0: Bitrix\Main\Session\Session-&gt;start()
	/home/s/sabon/sabon/public_html/bitrix/modules/main/lib/Session/KernelSessionProxy.php:47
#1: Bitrix\Main\Session\KernelSessionProxy-&gt;start()
	/home/s/sabon/sabon/public_html/bitrix/modules/main/include.php:151
#2: require_once(string)
	/home/s/sabon/sabon/public_html/bitrix/modules/main/include/prolog_before.php:19
#3: require_once(string)
	/home/s/sabon/sabon/public_html/bitrix/modules/main/include/prolog.php:10
#4: require_once(string)
	/home/s/sabon/sabon/public_html/bitrix/header.php:2
#5: require(string)
	/home/s/sabon/sabon/public_html/company/news/index.php:2
----------
</pre>