private boolean isApplicationKeyBound(@NonNull final Integer index, @NonNull final List<ApplicationKey> keys) {
        for (ApplicationKey key : keys) {
            if (index == key.getKeyIndex())
                return true;
        }
        return false;
    }
Checks if the given Application Key is bound to the network keys in the list

@param networkKeys    List of Network keys.
@param applicationKey Application key.
@return true if bound and false otherwise
mesh/src/main/java/no/nordicsemi/android/mesh/ImportExportUtils.java