Long[] suffix = {(long) 86, (long) 99};
      Long[] all = concat(concat(prefix, elements), suffix);
      return asList(all).subList(2, elements.length + 2);
    }
  }

  private static Long[] concat(Long[] left, Long[] right) {
    Long[] result = new Long[left.length + right.length];
    System.arraycopy(left, 0, result, 0, left.length);
    System.arraycopy(right, 0, result, left.length, right.length);

      }
    };

    static boolean test(long base, long n) {
      // Since base will be considered % n, it's okay if base > FLOOR_SQRT_MAX_LONG,
      // so long as n <= FLOOR_SQRT_MAX_LONG.
      return ((n <= FLOOR_SQRT_MAX_LONG) ? SMALL : LARGE).testWitness(base, n);
    }

    /** Returns a * b mod m. */
    abstract long mulMod(long a, long b, long m);

    /** Returns a^2 mod m. */

        .addEqualityGroup(STR_TO_LONG, STR_TO_LONG.reverse().reverse())
        .addEqualityGroup(STR_TO_LONG.reverse(), STR_TO_LONG.reverse())
        .testEquals();
  }

  public void testReverseReverse() {
    Converter<String, Long> converter = STR_TO_LONG;
    assertEquals(converter, converter.reverse().reverse());
  }

  public void testApply() {
    assertEquals(LONG_VAL, STR_TO_LONG.apply(STR_VAL));
  }

    }

    @Override
    @CheckForNull
    public Long previous(Long value) {
      long l = value;
      return (l == Long.MIN_VALUE) ? null : l - 1;
    }

    @Override
    Long offset(Long origin, long distance) {
      checkNonnegative(distance, "distance");
      long result = origin + distance;
      if (result < 0) {
        checkArgument(origin < 0, "overflow");
      }

    @Override
    protected List<Long> create(Long[] elements) {
      Long[] prefix = {Long.MIN_VALUE, Long.MAX_VALUE};
      Long[] suffix = {86L, 99L};
      Long[] all = concat(concat(prefix, elements), suffix);
      return makeArray(all).subArray(2, elements.length + 2).asList();
    }
  }

  @J2ktIncompatible
  @GwtIncompatible // used only from suite
  private static Long[] concat(Long[] a, Long[] b) {

    assertThat(LONG_MANY_VALUES_STATS_ITERATOR.sum())
        .isWithin(ALLOWED_ERROR * LONG_MANY_VALUES_MEAN)
        .of(LONG_MANY_VALUES_MEAN * LONG_MANY_VALUES_COUNT);
    assertThat(LONG_MANY_VALUES_STATS_SNAPSHOT.sum())
        .isWithin(ALLOWED_ERROR * LONG_MANY_VALUES_MEAN)
        .of(LONG_MANY_VALUES_MEAN * LONG_MANY_VALUES_COUNT);
  }

  public void testPopulationVariance() {

    protected int pageSize;

    protected int currentPageNumber;

    protected long allRecordCount;

    protected String allRecordCountRelation;

    protected int allPageCount;

    protected boolean existNextPage;

    protected boolean existPrevPage;

    protected long currentStartRecordNumber;

    protected long currentEndRecordNumber;

    protected List<String> pageNumberList;

    @Override
    protected List<Long> create(Long[] elements) {
      Long[] prefix = {Long.MIN_VALUE, Long.MAX_VALUE};
      Long[] suffix = {86L, 99L};
      Long[] all = concat(concat(prefix, elements), suffix);
      return makeArray(all).subArray(2, elements.length + 2).asList();
    }
  }

  @J2ktIncompatible
  @GwtIncompatible // used only from suite
  private static Long[] concat(Long[] a, Long[] b) {

    }

    @Override
    @CheckForNull
    public Long previous(Long value) {
      long l = value;
      return (l == Long.MIN_VALUE) ? null : l - 1;
    }

    @Override
    Long offset(Long origin, long distance) {
      checkNonnegative(distance, "distance");
      long result = origin + distance;
      if (result < 0) {
        checkArgument(origin < 0, "overflow");
      }

  /* Helper function to make a Long value from an Integer. */
  private static final Function<Integer, Long> TO_LONG =
      new Function<Integer, Long>() {
        @Override
        public Long apply(Integer n) {
          return Long.valueOf(n);
        }
      };

  /* Helper function to make a BigInteger value from a Long. */
  private static final Function<Long, BigInteger> TO_BIGINTEGER =