This inheritance list is sorted roughly, but not completely, alphabetically:

[detail level 123]

▼CActionController
CTimezonesController
▼CActor
CAcceptanceTester
CFrontendPagesCest
▼CModule
CAcceptance
CTimezonesUtility
▼CException
▼CException
CModuleNotLoadedException
▼CFunctionalTestCase
CTimezoneServiceTest
▼CSingletonInterface
▼CAbstractExtensionService
CCookieService
CExtensionHelperService
CTimezoneService
CLoggingService