This doesn't affect `Path` parameters as the value is always required.
            The parameter is available only for compatibility.
            """
        ),
    ] = ...,
    *,
    default_factory: Annotated[
        Callable[[], Any] | None,
        Doc(
            """
            A callable to generate the default value.

            This doesn't affect `Path` parameters as the value is always required.

        SynonymItem item = new SynonymItem(1, originalInputs, new String[] { "x" });

        String[] returnedInputs = item.getInputs();

        // Modifying returned array should not affect original
        returnedInputs[0] = "modified";

        // Get again and verify not modified
        String[] inputs2 = item.getInputs();
        assertEquals("a", inputs2[0]);

        assertEquals(123, newParams.get("key2"));

        // Verify that modifications to new instance don't affect original
        newParams.put("key3", "value3");
        assertTrue(newParams.containsKey("key3"));
        assertFalse(dataStoreParams.containsKey("key3"));

        // Verify that modifications to original don't affect new instance
        dataStoreParams.put("key4", "value4");

   * unprivileged user may return a resource accessible only to a privileged user making a similar
   * call. To prevent this problem, create a key object that includes all values that affect the
   * result of the query. Or use {@code LoadingCache.get(K)}, which lacks the ability to refer to
   * state other than that in the key.
   *

        item1.id = 100L;
        item2.id = 200L;

        assertEquals(100L, item1.getId());
        assertEquals(200L, item2.getId());

        // Verify they don't affect each other
        item1.id = 300L;
        assertEquals(300L, item1.getId());
        assertEquals(200L, item2.getId());
    }

    @Test
    public void test_constructor() {

        .addEqualityGroup(
            newDelegatingListWithEquals(LIST2),
            newProxyWithSubHandler1(LIST2), // Makes sure type of handler doesn't affect equality
            newProxyWithSubHandler2(LIST2))
        .addEqualityGroup(newDelegatingIterableWithEquals(LIST2)) // different interface
        .testEquals();
  }

I think `Union[SomeType, None]` is more explicit about what it means.

It's just about the words and names. But those words can affect how you and your teammates think about the code.

As an example, let's take this function:

```python
from typing import Optional


def say_hi(name: Optional[str]):
    print(f"Hey {name}!")
```

        CharMappingItem item = new CharMappingItem(1L, originalInputs, "output");

        String[] returnedInputs = item.getInputs();

        // Modifying returned array should not affect original
        returnedInputs[0] = "modified";

        // Get again and verify not modified
        String[] inputs2 = item.getInputs();
        assertEquals("a", inputs2[0]);

* `upgrade`: Upgrades

	//   key: The key representing the SQL query, used for caching and preparing the statement.
	//   isTransaction: Indicates whether this operation is part of a transaction, which may affect the caching strategy.
	//   connPool: A connection pool that provides database connections.
	//   locker: A synchronization lock that is unlocked after initialization to avoid deadlocks.
	// Returns: