iTop/application/applicationextension/portal/AbstractPortalUIExtension.php

<?php

/**
 * Extend this class instead of iPortalUIExtension if you don't need to overload all methods
 *
 * @api
 * @package     PortalExtensibilityAPI
 * @since       2.4.0
 */
abstract class AbstractPortalUIExtension implements iPortalUIExtension
{
	/**
	 * @inheritDoc
	 */
	public function GetCSSFiles(\Symfony\Component\DependencyInjection\Container $oContainer)
	{
		return [];
	}

	/**
	 * @inheritDoc
	 */
	public function GetCSSInline(\Symfony\Component\DependencyInjection\Container $oContainer)
	{
		return null;
	}

	/**
	 * @inheritDoc
	 */
	public function GetJSFiles(\Symfony\Component\DependencyInjection\Container $oContainer)
	{
		return [];
	}

	/**
	 * @inheritDoc
	 */
	public function GetJSInline(\Symfony\Component\DependencyInjection\Container $oContainer)
	{
		return null;
	}

	/**
	 * @inheritDoc
	 */
	public function GetBodyHTML(\Symfony\Component\DependencyInjection\Container $oContainer)
	{
		return null;
	}

	/**
	 * @inheritDoc
	 */
	public function GetMainContentHTML(\Symfony\Component\DependencyInjection\Container $oContainer)
	{
		return null;
	}

	/**
	 * @inheritDoc
	 */
	public function GetNavigationMenuHTML(\Symfony\Component\DependencyInjection\Container $oContainer)
	{
		return null;
	}
}