Notifies the subscriber that the subscription connection state has changed. The subscriber won't be
notified of funding source changes until the connection status changes to [ConnectionState.CONNECTED]. The subscriber will
stop receiving funding source change notifications when the connection state changes to [ConnectionState.DISCONNECTED].
Notifies the subscriber that the subscription connection state has changed. The subscriber won't be notified of funding source changes until the connection status changes to [ConnectionState.CONNECTED]. The subscriber will stop receiving funding source change notifications when the connection state changes to [ConnectionState.DISCONNECTED].