box.unregister();
}
LOGGER.info("creating '" + box.getName() + "'");
final VirtualBox vb = box.getVirtualBox();
final VirtualBox.Machine machine = vb.getMachine();
assert machine != null;
if (box.is64Bit() != SystemUtils2.is64Bit()) {
LOGGER.warn("host is "+(SystemUtils2.is64Bit() ? "64" : "32") +"bit, guest " +(box.is64Bit() ? "64":"32")+"bit: mismatch, performance might be very slow (see http://alexec.github.com/maven-vbox-plugin/64-bit.html)");