Can't validate function where literal can be changed between 0 and 1

[espertus]

This isn't urgent, because I can substitute another problem.

package edu.northeastern.examples.larger_non_negative;

import edu.illinois.cs.cs125.questioner.lib.Correct;
import edu.illinois.cs.cs125.questioner.lib.Wrap;

/*
 * Write a method `largerNonNegative` that returns the larger of 2 `int`
 * arguments, or 0 if both of the arguments are negative.
 */
@SuppressWarnings("ManualMinMaxCalculation")
@Correct(name = "Larger Non-Negative", author = "e.spertus@northeastern.edu", version = "2023.12.0")
@Wrap
public class Question {
  int largerNonNegative(int first, int second) {
    if (first < 0 && second < 0) { // mutate-disable-conditional-boundary
      return 0;
    } else if (first > second) { // mutate-disable-conditional-boundary
      return first;
    } else {
      return second;
    }
  }
}

This can't be validated becase changing the int literals in the first if-condition from 0 to 1 does not affect behavior.