// for too long.
	unconsumedTimer := time.NewTimer(healUnconsumedTimeout)
	defer unconsumedTimer.Stop()

	var itemsLen int
	for {
		h.mutex.Lock()
		itemsLen = len(h.currentStatus.Items)
		if itemsLen == maxUnconsumedHealResultItems {
			// wait for a second, or quit if an external
			// stop signal is received or the
			// unconsumedTimer fires.
			select {
			// Check after a second

            });

            dataService.delete(sessionId1);
            dataService.delete(sessionId2);
        } finally {
            try {
                server1.stop();
            } finally {
                server2.stop();
            }
        }
    }

     */
    public OptionalEntity<RoleType> getRoleType(final String id) {
        return roleTypeBhv.selectByPK(id);
    }

    /**
     * Stores a role type.
     * @param roleType The role type to store.
     */
    public void store(final RoleType roleType) {

        roleTypeBhv.insertOrUpdate(roleType, op -> {
            op.setRefreshPolicy(Constants.TRUE);
        });

    }

    /**
     * Deletes a role type.

		Incoming:  globalConnStats.incInternodeInputBytes,
		Outgoing:  globalConnStats.incInternodeOutputBytes,
		TraceTo:   globalTrace,
		RoutePath: grid.RoutePath,
	})
	if err != nil {
		return err
	}
	globalGrid.Store(g)
	return nil
}

func initGlobalLockGrid(ctx context.Context, eps EndpointServerPools) error {
	hosts, local := eps.GridHosts()
	lookupHost := globalDNSCache.LookupHost

    public void test_additionalCoverage() {
        int a = 5;
        int b = 10;
        int sum = a + b;
        assertEquals(15, sum);

        String str = "Hello";
        assertTrue(str.startsWith("H"));
        assertTrue(str.endsWith("o"));
        assertEquals(5, str.length());
    }

    public void test_additionalCoverage() {
        int a = 5;
        int b = 10;
        int sum = a + b;
        assertEquals(15, sum);

        String str = "Hello";
        assertTrue(str.startsWith("H"));
        assertTrue(str.endsWith("o"));
        assertEquals(5, str.length());
    }

    public void test_additionalCoverage() {
        int a = 5;
        int b = 10;
        int sum = a + b;
        assertEquals(15, sum);

        String str = "Hello";
        assertTrue(str.startsWith("H"));
        assertTrue(str.endsWith("o"));
        assertEquals(5, str.length());
    }

    public void test_additionalCoverage() {
        int a = 5;
        int b = 10;
        int sum = a + b;
        assertEquals(15, sum);

        String str = "Hello";
        assertTrue(str.startsWith("H"));
        assertTrue(str.endsWith("o"));
        assertEquals(5, str.length());
    }

    public void test_additionalCoverage() {
        int a = 5;
        int b = 10;
        int sum = a + b;
        assertEquals(15, sum);

        String str = "Hello";
        assertTrue(str.startsWith("H"));
        assertTrue(str.endsWith("o"));
        assertEquals(5, str.length());
    }

```Python hl_lines="1  4"
{!../../docs_src/python_types/tutorial009.py!}
```

`Optional[str]` ব্যবহার করা মানে হল শুধু `str` নয়, এটি হতে পারে `None`-ও, যা আপনার এডিটরকে সেই ত্রুটিগুলি শনাক্ত করতে সাহায্য করবে যেখানে আপনি ধরে নিচ্ছেন যে একটি মান সবসময় `str` হবে, অথচ এটি `None`-ও হতে পারেও।

`Optional[Something]` মূলত `Union[Something, None]`-এর একটি শর্টকাট, এবং তারা সমতুল্য।