static Concept cnew(S name, O... values) {
  ret cnew(db_mainConcepts(), name, values);
}

static Concept cnew(Concepts concepts, S name, O... values) {
  Class<? extends Concept> cc = findClass(name);
  concepts_unlisted.set(true);
  Concept c;
  try {
    c = cc != null ? nuObject(cc) : new Concept(name);
  } finally {
    concepts_unlisted.set(null);
  }
  csetAll(c, values);
  concepts.register(c);
  ret c;
}

static <A extends Concept> A nuLike cnew(Class<A> cc, O... values) {
  ret cnew(db_mainConcepts(), cc, values);
}

static <A extends Concept> A cnew(Concepts concepts, Class<A> cc, O... values) {
  concepts_unlisted.set(true);
  A c;
  try {
    c = nuObject(cc);
  } finally {
    concepts_unlisted.set(null);
  }
  csetAll(c, values);
  concepts.register(c);
  ret c;
}