private void checkLogPowRoundTrip(double value) {
         assertEquals("log(pow(x)) = x", value, this.axis.adjustedLog10(
                 this.axis.adjustedPow10(value)), EPSILON);
         assertEquals("pow(log(x)) = x", value, this.axis.adjustedPow10(
                 this.axis.adjustedLog10(value)), EPSILON);