options
Every setting of its own it reads from TransportConfig.options, each read through its option, for the host to bind and check (wow.<type>.<key>); a transport has no instances of its own, so it reads a ProviderOption.Scope.PER_STORE option as one of its type. The settings every topic transport has (TopicTransportOptions) are not listed again: TopicTransportOptions.of joins them.