virtual [TFuture](API\Runtime\Core\Async\TFuture)< [TOnlineResult](API\Plugins\OnlineServicesInterface\Online\TOnlineResult)< [FRemoveSessionMember](API\Plugins\OnlineServicesInterface\Online\FRemoveSessionMember) > > RemoveSessionMemberImpl ( const [FRemoveSessionMember::Params](API\Plugins\OnlineServicesInterface\Online\FRemoveSessionMember\Params) & Params )