response.getWriter()
                .write("{\"response\":{\"status\":9,\"message\":\"Server is busy. Please retry after " + RETRY_AFTER_SECONDS
                        + " seconds.\",\"retry_after\":" + RETRY_AFTER_SECONDS + "}}");
    }

                        // Ignore
                    }
                }).start();
            }

            startLatch.countDown();
            assertTrue(endLatch.await(1, TimeUnit.SECONDS));
            assertTrue(response.isReceived());
        }

        @Test
        @DisplayName("Should handle concurrent error notifications")
        void testConcurrentError() throws InterruptedException {

        assertEquals(20, bytesRead);
        assertEquals(0x0010, response.getAttributes());
        // getLastWriteTime returns lastWriteTime (from readUTime) + serverTimeZoneOffset
        // readUTime multiplies the seconds value by 1000, and writeUTime divides milliseconds by 1000
        // So the round-trip should preserve the milliseconds value
        assertEquals(sampleTimeMillis + serverTimeZoneOffset, response.getLastWriteTime());

    Range<Integer> closedRange = Range.closed(4, 8);

    // first range open end, second range open start
    assertEquals(Range.closed(2, 4), Range.lessThan(2).gap(openRange));
    assertEquals(Range.closed(2, 4), openRange.gap(Range.lessThan(2)));

    // first range closed end, second range open start
    assertEquals(Range.openClosed(2, 4), Range.atMost(2).gap(openRange));

    assertTrue(tokL.isSupertypeOf(StringList.class.getGenericInterfaces()[0]));

    @SuppressWarnings("rawtypes") // Trying to test raw class
    TypeToken<Second> tokS = new TypeToken<Second>() {};
    assertTrue(tokS.isSupertypeOf(Second.class));
    assertTrue(tokS.isSupertypeOf(Third.class.getGenericSuperclass()));
  }

  public void testAssignableArrayToClass() {

                if (attempt < 10) {
                    Thread.sleep(500); // First 10 attempts: 0.5 second intervals
                } else if (attempt < 30) {
                    Thread.sleep(1000); // Next 20 attempts: 1 second intervals
                } else {
                    Thread.sleep(2000); // Remaining attempts: 2 second intervals
                }
            }
        }

* `datetime.time`:
    * 파이썬의 `datetime.time`.
    * 요청과 응답에서 `14:23:55.003`와 같은 ISO 8601 형식의 `str`로 표현됩니다.
* `datetime.timedelta`:
    * 파이썬의 `datetime.timedelta`.
    * 요청과 응답에서 전체 초(seconds)의 `float`로 표현됩니다.
    * Pydantic은 "ISO 8601 time diff encoding"으로 표현하는 것 또한 허용합니다. [더 많은 정보는 문서를 확인하세요](https://docs.pydantic.dev/latest/concepts/serialization/#custom-serializers).
* `frozenset`:
    * 요청과 응답에서 `set`와 동일하게 취급됩니다:

        // Multiple quoted values - quotes are removed
        value = "\"first\",\"second\",\"third\"";
        result = KuromojiCSVUtil.parse(value);
        assertEquals(3, result.length);
        assertEquals("first", result[0]);
        assertEquals("second", result[1]);
        assertEquals("\"third\"", result[2]);

        // Mixed quoted and unquoted - quotes are removed from quoted values

					return
				case watchResp, ok := <-watchCh:
					if !ok {
						time.Sleep(1 * time.Second)
						// Upon an error on watch channel
						// re-init the watch channel.
						goto outerLoop
					}
					if err := watchResp.Err(); err != nil {
						iamLogIf(ctx, err)
						// log and retry.
						time.Sleep(1 * time.Second)
						// Upon an error on watch channel
						// re-init the watch channel.

				runAllIAMSTSTests(testCase, &check{t, testCase.serverType})
			},
		)
	}
}

func (s *TestSuiteIAM) TestSTSServiceAccountsWithUsername(c *check) {
	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
	defer cancel()

	bucket := "dillon-bucket"
	err := s.client.MakeBucket(ctx, bucket, minio.MakeBucketOptions{})
	if err != nil {
		c.Fatalf("bucket create error: %v", err)
	}

	// Create policy