this.delegate = requireNonNull(delegate, "delegate cannot be null");
        this.childrenTracking = parent;
    }

    public Object getDelegate() {
        return delegate;
    }

    public void update(Object newDelegate) {
        if (delegate != newDelegate) {
            if (childrenTracking != null) {
                childrenTracking.replace(delegate, newDelegate);

    price: float
    tax: Union[float, None] = None
    tags: list = []


@app.put("/items/{item_id}")
async def update_item(item_id: int, item: Item):
    results = {"item_id": item_id, "item": item}

    if_modified_since: Union[str, None] = None
    traceparent: Union[str, None] = None
    x_tag: list[str] = []


@app.get("/items/")
async def read_items(headers: Annotated[CommonHeaders, Header()]):

    item_id: Annotated[int, Path(title="The ID of the item to get")],
    q: Annotated[str | None, Query(alias="item-query")] = None,
):
    results = {"item_id": item_id}
    if q:
        results.update({"q": q})

class ItemV2(BaseModelV2):
    name: str
    description: str | None = None
    size: float


app = FastAPI()


@app.post("/items/", response_model=ItemV2)
async def create_item(item: Item):

    @Override
    public boolean apply(@Nullable Integer i) {
      return (i.intValue() & 1) == 1;
    }

    @Override
    public int hashCode() {
      return 0x150dd;
    }

    @Override
    public boolean equals(@Nullable Object obj) {
      return obj instanceof IsOdd;
    }

    @Override
    public String toString() {
      return "IsOdd";
    }
  }

  /**

    //                                                                       =============
    @Override
    public String asTableDbName() {
        return "related_query";
    }

    @Override
    public String xgetAliasName() {
        return "related_query";
    }

    // ===================================================================================

    //                                                                       =============
    @Override
    public String asTableDbName() {
        return "role_type";
    }

    @Override
    public String xgetAliasName() {
        return "role_type";
    }

    // ===================================================================================

    //                                                                       =============
    @Override
    public String asTableDbName() {
        return "click_log";
    }

    @Override
    public String xgetAliasName() {
        return "click_log";
    }

    // ===================================================================================

		}
	}

	// Deleting fileInfos[4].VersionID, fileInfos[5].VersionID should return empty data dir; there are other object version sharing the data dir.
	// Subsequently deleting fileInfos[6].versionID should return fileInfos[6].dataDir since there are no other object versions sharing this data dir.
	count := len(testCases)
	for i := 4; i < len(testCases); i++ {