bloc library Null safety

Classes

DeleteThreadEvent
InitialThreadState
InitThreadEvent
RefreshHistoryThreadEvent
RefreshThreadEvent
RefreshVisitorThreadAllEvent
RefreshVisitorThreadEvent
RequestAgentEvent
RequestAgentSuccess
RequestContactThreadEvent
RequestContactThreadSuccess
RequestGroupThreadEvent
RequestGroupThreadSuccess
RequestThreadEvent
RequestThreadSuccess
ThreadBloc
ThreadEmpty
ThreadEvent
ThreadHistoryLoading
ThreadLoadError
ThreadLoading
ThreadLoadSuccess
ThreadState
ThreadUninitialized
ThreadVisitorLoading
UpdateThreadEvent