LOGGER.debug("post " + c.toString());
}
solver.postTemp(c);
// the constraint has been added during the resolution.
// it should be removed on backtrack -> create a new undo operation
solver.getEnvironment().save(new Operation() {
@Override
public void undo() {
if (LOGGER.isDebugEnabled()) {
LOGGER.debug("unpost " + c.toString());
}