void testJoinWithStringBuilder() {
        StringBuilder sb1 = new StringBuilder("first");
        StringBuilder sb2 = new StringBuilder("second");
        String result = StringUtil.join(",", sb1, sb2);
        assertEquals("first,second", result);
    }

    @Test
    @DisplayName("Should handle StringBuffer as CharSequence")
    void testJoinWithStringBuffer() {

        InvertibleCryptographer first = securityResourceProvider.providePrimaryInvertibleCryptographer();
        InvertibleCryptographer second = securityResourceProvider.providePrimaryInvertibleCryptographer();

        assertNotNull(first);
        assertNotNull(second);
        assertSame(first, second);
        assertSame(invertibleCryptographer, first);
    }

    @Test

        ChannelInfo second = loadBalancer.selectChannel(mockMessage);

        assertNotNull(first);
        assertNotNull(second);
        // Due to round-robin, should get different channels or same order
        assertTrue(Arrays.asList(channel1, channel2).contains(first));
        assertTrue(Arrays.asList(channel1, channel2).contains(second));
    }

    @Test

    TestCallable secondCallable = new TestCallable(SettableFuture.create());
    Future<?> second = serializer.submitAsync(secondCallable, directExecutor());
    assertThat(secondCallable.called).isFalse();
    assertThat(second.toString()).contains(secondCallable.toString());
    firstFuture.set(null);
    assertThat(second.toString()).contains(secondCallable.future.toString());
  }

   * @param second the second array of elements to concatenate
   * @param type the component type of the returned array
   */
  @GwtIncompatible // Array.newInstance(Class, int)
  public static <T extends @Nullable Object> T[] concat(
      T[] first, T[] second, Class<@NonNull T> type) {
    T[] result = newArray(type, first.length + second.length);
    arraycopy(first, 0, result, 0, first.length);

		cfg.Delay, cfg.MaxWait, cfg.Cycle = 0, 0, time.Second
	case "fast":
		cfg.Delay, cfg.MaxWait, cfg.Cycle = 1, 100*time.Millisecond, time.Minute
	case "default":
		cfg.Delay, cfg.MaxWait, cfg.Cycle = 2, time.Second, time.Minute
	case "slow":
		cfg.Delay, cfg.MaxWait, cfg.Cycle = 10, 15*time.Second, time.Minute
	case "slowest":
		cfg.Delay, cfg.MaxWait, cfg.Cycle = 100, 15*time.Second, 30*time.Minute
	default:

		if terr != nil {
			t.Errorf("failed to accept new connection. %v", terr)
			return
		}
		deadlineconn := New(tcpConn)
		deadlineconn.WithReadDeadline(time.Second)
		deadlineconn.WithWriteDeadline(time.Second)
		defer deadlineconn.Close()

		// Read a line
		b := make([]byte, 12)
		_, terr = deadlineconn.Read(b)
		if terr != nil {
			t.Errorf("failed to read from client. %v", terr)
			return

        ByteBuffer buffer = ByteBuffer.allocate(200);
        buffer.order(ByteOrder.LITTLE_ENDIAN);

        // First notification with nextEntryOffset pointing to second
        int secondOffset = 48;
        buffer.putInt(secondOffset); // nextEntryOffset to second entry
        buffer.putInt(FileNotifyInformation.FILE_ACTION_ADDED);
        String fileName1 = "first.txt";
        byte[] fileNameBytes1 = fileName1.getBytes("UTF-16LE");

      if (first == null) {
        actionWhenFirstParamIsNull.act();
      }
      if (second == null) {
        actionWhenSecondParamIsNull.act();
      }
    }

    /** Two-arg method with no Nullable params. */
    public void normalNormal(String first, Integer second) {
      reactToNullParameters(first, second);
    }

// timestamp as used in S3 Select
func FormatSQLTimestamp(t time.Time) string {
	_, zoneOffset := t.Zone()
	hasZone := zoneOffset != 0
	hasFracSecond := t.Nanosecond() != 0
	hasSecond := t.Second() != 0
	hasTime := t.Hour() != 0 || t.Minute() != 0
	hasDay := t.Day() != 1
	hasMonth := t.Month() != 1

	switch {
	case hasFracSecond:
		return t.Format(layoutNanosecond)
	case hasSecond: