<groupId>com.example.group</groupId>
  <artifactId>valid-version-changelist</artifactId>
  <version>${changelist}</version>

  <description>
    This will test if the validation for the ci friendly versions
    is working correct.
  </description>

  <groupId>org.apache.maven.its</groupId>
  <artifactId>b</artifactId>
  <version>0.1</version>
  <packaging>jar</packaging>

  <name>Maven Integration Test :: Dummy Artifact</name>
  <description>

  </description>

  <distributionManagement>
    <repository>
      <id>maven-core-it</id>
      <url>file:///${basedir}/repo</url>
    </repository>
  </distributionManagement>

  <dependencies>

                "get": {
                    "responses": {
                        "200": {
                            "description": "Successful Response",
                            "content": {"application/json": {"schema": {}}},
                        },
                        "422": {
                            "description": "Validation Error",
                            "content": {
                                "application/json": {

    <artifactId>maven</artifactId>
    <version>4.0.0-alpha-1-SNAPSHOT</version>
  </parent>

  <artifactId>maven-model</artifactId>

  <name>Maven Model</name>
  <description>Model for Maven POM (Project Object Model)</description>

  <dependencies>
    <dependency>
      <groupId>org.apache.maven</groupId>
      <artifactId>maven-api-model</artifactId>
      <version>4.0.0-alpha-1-SNAPSHOT</version>

            false, false, "Long", 0, 0, null, null, false, null, null, null, null, null, false);
    protected final ColumnInfo _columnDescription = cci("description", "description", null, null, String.class, "description", null, false,
            false, false, "text", 0, 0, null, null, false, null, null, null, null, null, false);

                                            key="labels.description"/></label>
                                    <div class="col-sm-9">
                                        <la:errors property="description"/>
                                        <la:textarea styleId="description" property="description"
                                                     styleClass="form-control"

plugins {
    id("gradlebuild.build-logic.kotlin-dsl-gradle-plugin")
}

description = "Provides a plugin that configures IntelliJ's idea-ext plugin"

dependencies {
    implementation("gradlebuild:basics")
    implementation("gradle.plugin.org.jetbrains.gradle.plugin.idea-ext:gradle-idea-ext")

Наприклад, ця модель вище оголошує JSON "`об'єкт`" (або Python `dict`), як:

```JSON
{
    "name": "Foo",
    "description": "An optional description",
    "price": 45.2,
    "tax": 3.5
}
```

...оскільки `description` і `tax` є необов'язковими (зі значенням за замовчуванням `None`), цей JSON "`об'єкт`" також буде дійсним:

```JSON
{
    "name": "Foo",
    "price": 45.2
}

from fastapi import FastAPI
from pydantic import BaseModel


class Item(BaseModel):
    name: str
    description: str | None = None
    price: float
    tax: float | None = None


app = FastAPI()


@app.post("/items/")
async def create_item(item: Item):

from dataclasses import dataclass

from fastapi import FastAPI


@dataclass
class Item:
    name: str
    price: float
    description: str | None = None
    tax: float | None = None


app = FastAPI()


@app.post("/items/")
async def create_item(item: Item):