See Codesearch query:
https://codesearch.wmcloud.org/skins/?q=getOption&i=nope&files=&repos=Skin:Cosmos
User->getOption() is deprecated in 1.35, and replaced with the UserOptionsLookup service.
CosmosTemplate.php
if ( ( !$permissionManager->userHasRight( $skin->getUser(), 'managewiki' ) ) && ( $wgManageWikiForceSidebarLinks || $skin->getUser() ->getOption( 'managewikisidebar', 1 ) ) ) { $append = '-view'; } if ( ( $permissionManager->userHasRight( $skin->getUser(), 'managewiki' ) || $wgManageWikiForceSidebarLinks || $skin->getUser() ->getOption( 'managewikisidebar', 1 ) ) && $wgManageWikiSidebarLinks !== false ) {
SkinCosmos.php
if ( $this->getSkin() ->getUser() ->getOption( 'cosmos-mobile-responsiveness' ) == 1 ) {