from pydantic import BaseModel, Field

app = FastAPI()


class Item(BaseModel):
    name: str
    description: Union[str, None] = Field(
        default=None, title="The description of the item", max_length=300
    )
    price: float = Field(gt=0, description="The price must be greater than zero")
    tax: Union[float, None] = None


@app.put("/items/{item_id}")

                            {
                                "title": "The description of the item",
                                "anyOf": [
                                    {"maxLength": 300, "type": "string"},
                                    {"type": "null"},
                                ],
                            }
                        )
                        | IsDict(

                    <mxGeometry x="710" y="-50" width="300" height="80" as="geometry"/>
                </mxCell>

=== ":material-language-kotlin: Kotlin"
    ```kotlin
      private val client = OkHttpClient()

      fun run() {
        val request = Request.Builder()

                            {
                                "title": "The description of the item",
                                "anyOf": [
                                    {"maxLength": 300, "type": "string"},
                                    {"type": "null"},
                                ],
                            }
                        )
                        | IsDict(

            proxy_set_header X-Real-IP $remote_addr;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
            proxy_set_header X-Forwarded-Proto $scheme;

            proxy_connect_timeout 300;
            # Default is HTTP/1, keepalive is only enabled in HTTP/1.1
            proxy_http_version 1.1;
            proxy_set_header Connection "";
            chunked_transfer_encoding off;

            proxy_set_header X-Real-IP $remote_addr;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
            proxy_set_header X-Forwarded-Proto $scheme;

            proxy_connect_timeout 300;
            # Default is HTTP/1, keepalive is only enabled in HTTP/1.1
            proxy_http_version 1.1;
            proxy_set_header Connection "";
            chunked_transfer_encoding off;

    static final int DEFAULT_SND_BUF_SIZE = 576;
    static final int NAME_SERVICE_UDP_PORT = 137;
    static final int DEFAULT_RETRY_COUNT = 2;
    static final int DEFAULT_RETRY_TIMEOUT = 3000;

    static final int RESOLVER_LMHOSTS = 1;
    static final int RESOLVER_BCAST   = 2;
    static final int RESOLVER_WINS    = 3;

            27880, 21205, 3007, 960, 2350, 21270, 23433, 1591, 2368, 29305, 20301, 20320, 12490,
            39064, 32463, 21147, 31034, 51648, 20135, 21033, 23601, 24687, 38382, 19977, 37117,
            24335, 44032, 951, 4308, 2354, 21153, 3655, 21516, 12509, 269, 21271, 7841, 8364, 9733,
            25237, 31449, 12480, 20204, 2980, 38291, 20445, 1502, 21496, 51032, 3009, 49828, 20803,

    data = {
        "start_datetime": "2018-12-22T14:00:00+00:00",
        "end_datetime": "2018-12-24T15:00:00+00:00",
        "repeat_at": "15:30:00",
        "process_after": 300,
    }
    expected_response = data.copy()
    expected_response.update(
        {
            "start_process": "2018-12-22T14:05:00+00:00",
            "duration": 176_100,
            "item_id": item_id,
        }