private boolean isNetworkKeyAdded(@NonNull final ProvisionedMeshNode node, @NonNull final List<NetworkKey> networkKeys) {
        for (NetworkKey networkKey : networkKeys) {
            for (NodeKey nodeKey : node.getAddedNetKeys()) {
                if (nodeKey.getIndex() == networkKey.getKeyIndex()) return true;
            }
        }
        return false;
    }
Checks if at least one Network Key is added to a node.

@param node        Mesh node.
@param networkKeys Network keys.
@return true if bound and false otherwise
mesh/src/main/java/no/nordicsemi/android/mesh/ImportExportUtils.java