docs: public static boolean[] sampleWithoutReplacementBooleans(int sampleSize, int n) {
          int[] indices = sampleWithoutReplacement(sampleSize, n);
          Arrays.sort(indices);
          assert indices.length == sampleSize;
          boolean[] bools = new boolean[n];
          int j=0;
          for (int i=0; i<bools.length; i++) {
              if (j < indices.length && i==indices[j]) {
                  bools[i] = true;
                  j++;
              }
          }
          return bools;
      }