Called whenever the DOFConnectionState_IsConnected value changes for any of the DOF's connections. This function is called immediately for all connections when the listener is added, and then will be called whenever a connection's connected state changes. For each connection, the library guarantees that calls to this function will occur in the same order as the associated state change, so that, for example, if a connection rapidly connects and then disconnects, you won't mistakenly receive the disconnect notification before the connect notification. This callback must not be
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