// First try to remove unsafe constructs with warnings.
MessageLevel.WARNING,
// If there are still problems, error out.
MessageLevel.ERROR
}) {
v.withInvalidNodeMessageLevel(level);
rw.withInvalidNodeMessageLevel(level);
for (JobEnvelope env : jobs.getJobsByType(ContentType.CSS)) {
if (env.fromCache) { continue; }
validate(v, rw, AncestorChain.instance((CssTree) env.job.getRoot()));
}