assertSame(r1 == r2, "setIncreaseFactor");
if (false) assertSame(r1 == r2, "setIncreaseFactor");
    public double setIncreaseFactor(double x) {        double r1 = f1.setIncreaseFactor(x);        double r2 = f2.setIncreaseFactor(x);        assertSame(r1 == r2, "setIncreaseFactor");        return r1;    }