/**
	 * Load the styles of one or more ResourceLoader modules on this page.
	 *
	 * Module styles added through this function will be loaded as a stylesheet,
	 * using a standard `<link rel=stylesheet>` HTML tag, rather than as a combined
	 * Javascript and CSS package. Thus, they will even load when JavaScript is disabled.
	 *
	 * @param string|array $modules Module name (string) or array of module names
	 */
	public function addModuleStyles( $modules ) {
		foreach ( (array)$modules as $moduleName ) {
			$isIconPack = strpos( $moduleName, 'oojs-ui.styles.icons-' ) === 0;
			$isSingleIcon = strpos( $moduleName, 'oojs-ui.styles.icon.' ) === 0;
			if ( $isIconPack ) {
				/** @var ResourceLoaderOOUIIconPackModule $moduleObj */
				$moduleObj = $this->getResourceLoader()->getModule( $moduleName );
				$this->handleOneModuleStylesWithDeprecations( $moduleName, $moduleObj );
				// Handle dependencies for icon packs, even though they are style modules...
				// (Replace icon pack module with individual icon modules.)
				foreach ( $moduleObj->getDependencies() as $moduleName ) {
					/** @var ResourceLoaderOOUISingleIconModule $moduleObj */
					$moduleObj = $this->getResourceLoader()->getModule( $moduleName );
					$this->handleOneModuleStylesWithDeprecations( $moduleName, $moduleObj );
				}
			} elseif ( $isSingleIcon ) {
				/** @var ResourceLoaderOOUISingleIconModule $moduleObj */
				$moduleObj = $this->getResourceLoader()->getModule( $moduleName );
				$this->handleOneModuleStylesWithDeprecations( $moduleName, $moduleObj );
			} else {
				$this->mModuleStyles[] = $moduleName;
			}
		}
	}

	/**
	 * @param string $moduleName
	 * @param ResourceLoaderOOUISingleIconModule|ResourceLoaderOOUIIconPackModule $moduleObj
	 */
	private function handleOneModuleStylesWithDeprecations( $moduleName, $moduleObj ) {
		$this->mModuleStyles[] = $moduleName;
	
		if ( $moduleObj ) {
			// Maybe add deprecation warning.
			// (Icon packs are all deprecated, individual icons can also be deprecated.)
			$deprecation = $moduleObj->getDeprecationInformation();
			if ( $deprecation ) {
				$this->addScript( ResourceLoader::makeInlineScript( $deprecation ) );
			}
		}
	}