@Override
    public void identifyNode(@NonNull final UUID deviceUuid,
                             final int attentionTimer) throws IllegalArgumentException {
        final NetworkKey networkKey = mMeshNetwork.getPrimaryNetworkKey();
        if (networkKey != null) {
            mMeshProvisioningHandler.identify(deviceUuid, networkKey, mMeshNetwork.getProvisioningFlags(),
                    mMeshNetwork.getIvIndex().getIvIndex(), mMeshNetwork.getGlobalTtl(), attentionTimer);
        }
    }
Appends the PDUs that are segmented at gatt layer.

@param mtuSize mtu size supported by the device/node
@param pdu     pdu received by the provisioner
@return the combine pdu or returns null if not complete.
mesh/src/main/java/no/nordicsemi/android/mesh/MeshManagerApi.java