private boolean isAppKeyExists(@NonNull final byte[] appKey) {
        for (int i = 0; i < appKeys.size(); i++) {
            final ApplicationKey applicationKey = appKeys.get(i);
            if (Arrays.equals(applicationKey.getKey(), appKey)) {
                return true;
            }
        }
        return false;
    }
Returns a list of application keys bound to a Network key

@param boundNetKeyIndex Network Key index
mesh/src/main/java/no/nordicsemi/android/mesh/BaseMeshNetwork.java