throw new IOException(ex);
final IOException ioe = new IOException("BlockDeviceAPI not found on device"); ioe.initCause(ex); throw ioe;
    public MappedFSBlockDeviceSupport(Device parent, long offset, long length)            throws IOException {        super(parent, offset, length);        try {            this.parentApi = (FSBlockDeviceAPI) parent.getAPI(FSBlockDeviceAPI.class);        } catch (ApiNotFoundException ex) {            throw new IOException(ex);        }        registerAPI(FSBlockDeviceAPI.class, this);    }