src/main/java/com/basistech/tclre/State.java
Arc findarc(int type, short co) {
        for (Arc a = outs; a != null; a = a.outchain) {
            if (a.type == type && a.co == co) {
                return a;
            }
        }
        return null;
    }
Arc findarc(int type, short co) {
        for (Arc a = outs; a != null; a = a.outchain) {
            if (a.type == type && a.co == co) {
                return a;
            }
        }
        return null;
    }
/* back chain