* Returns a {@code TopKSelector} that collects the greatest {@code k} elements added to it,
   * relative to the natural ordering of the elements, and returns them via {@link #topK} in
   * descending order.
   *
   * @throws IllegalArgumentException if {@code k < 0} or {@code k > Integer.MAX_VALUE / 2}
   */
  public static <T extends Comparable<? super T>> TopKSelector<T> greatest(int k) {
    return greatest(k, Ordering.natural());
  }

  /**

            new long[] {LEAST, LEAST},
            new long[] {LEAST, 1L},
            new long[] {1L},
            new long[] {1L, LEAST},
            new long[] {GREATEST, GREATEST - 1L},
            new long[] {GREATEST, GREATEST},
            new long[] {GREATEST, GREATEST, GREATEST});

    Comparator<long[]> comparator = UnsignedLongs.lexicographicalComparator();
    Helpers.testComparator(comparator, ordered);
  }

            new byte[] {LEAST, (byte) 1},
            new byte[] {(byte) 1},
            new byte[] {(byte) 1, LEAST},
            new byte[] {GREATEST, GREATEST - (byte) 1},
            new byte[] {GREATEST, GREATEST},
            new byte[] {GREATEST, GREATEST, GREATEST});

    Comparator<byte[]> comparator = SignedBytes.lexicographicalComparator();
    Helpers.testComparator(comparator, ordered);
  }

            new byte[] {LEAST, (byte) 1},
            new byte[] {(byte) 1},
            new byte[] {(byte) 1, LEAST},
            new byte[] {GREATEST, GREATEST - (byte) 1},
            new byte[] {GREATEST, GREATEST},
            new byte[] {GREATEST, GREATEST, GREATEST});

    Comparator<byte[]> comparator = SignedBytes.lexicographicalComparator();
    Helpers.testComparator(comparator, ordered);
  }

            new int[] {LEAST, (int) 1},
            new int[] {(int) 1},
            new int[] {(int) 1, LEAST},
            new int[] {GREATEST, GREATEST - (int) 1},
            new int[] {GREATEST, GREATEST},
            new int[] {GREATEST, GREATEST, GREATEST});

    Comparator<int[]> comparator = Ints.lexicographicalComparator();
    Helpers.testComparator(comparator, ordered);
  }

  @J2ktIncompatible

            new int[] {LEAST, (int) 1},
            new int[] {(int) 1},
            new int[] {(int) 1, LEAST},
            new int[] {GREATEST, GREATEST - (int) 1},
            new int[] {GREATEST, GREATEST},
            new int[] {GREATEST, GREATEST, GREATEST});

    Comparator<int[]> comparator = Ints.lexicographicalComparator();
    Helpers.testComparator(comparator, ordered);
  }

  @J2ktIncompatible

            new char[] {LEAST, (char) 1},
            new char[] {(char) 1},
            new char[] {(char) 1, LEAST},
            new char[] {GREATEST, GREATEST - (char) 1},
            new char[] {GREATEST, GREATEST},
            new char[] {GREATEST, GREATEST, GREATEST});

    Comparator<char[]> comparator = Chars.lexicographicalComparator();
    Helpers.testComparator(comparator, ordered);
  }

  @J2ktIncompatible

            new short[] {LEAST, (short) 1},
            new short[] {(short) 1},
            new short[] {(short) 1, LEAST},
            new short[] {GREATEST, GREATEST - (short) 1},
            new short[] {GREATEST, GREATEST},
            new short[] {GREATEST, GREATEST, GREATEST});

    Comparator<short[]> comparator = Shorts.lexicographicalComparator();
    Helpers.testComparator(comparator, ordered);
  }

            new double[] {LEAST, 1.0},
            new double[] {1.0},
            new double[] {1.0, LEAST},
            new double[] {GREATEST, Double.MAX_VALUE},
            new double[] {GREATEST, GREATEST},
            new double[] {GREATEST, GREATEST, GREATEST});

    Comparator<double[]> comparator = Doubles.lexicographicalComparator();
    Helpers.testComparator(comparator, ordered);
  }

            new double[] {LEAST, 1.0},
            new double[] {1.0},
            new double[] {1.0, LEAST},
            new double[] {GREATEST, Double.MAX_VALUE},
            new double[] {GREATEST, GREATEST},
            new double[] {GREATEST, GREATEST, GREATEST});

    Comparator<double[]> comparator = Doubles.lexicographicalComparator();
    Helpers.testComparator(comparator, ordered);
  }