Объявите тело, используя стандартную типизацию Python, спасибо Pydantic.

```Python hl_lines="4  9-12  25-27"
from typing import Union

from fastapi import FastAPI
from pydantic import BaseModel

app = FastAPI()


class Item(BaseModel):
    name: str
    price: float
    is_offer: Union[bool, None] = None


@app.get("/")

 * either express or implied. See the License for the specific language
 * governing permissions and limitations under the License.
 */
package org.codelibs.core.exception;

import static org.codelibs.core.collection.ArrayUtil.asArray;

import java.lang.reflect.InvocationTargetException;

/**
 * Exception that wraps {@link InvocationTargetException}.
 *
 * @author higa
 */

 * either express or implied. See the License for the specific language
 * governing permissions and limitations under the License.
 */
package org.codelibs.fess.app.pager;

import java.io.Serializable;
import java.util.List;

import org.codelibs.fess.util.ComponentUtil;

/**
 * Pager class for stemmer override dictionary management.
 *
 * This class provides pagination functionality for displaying stemmer override

 * either express or implied. See the License for the specific language
 * governing permissions and limitations under the License.
 */
package org.codelibs.fess.app.pager;

import java.io.Serializable;
import java.util.List;

import org.codelibs.fess.util.ComponentUtil;

/**
 * Pager class for web authentication configurations.
 * Provides pagination functionality and search criteria for web authentication listings.
 */

 * either express or implied. See the License for the specific language
 * governing permissions and limitations under the License.
 */
package org.codelibs.fess.util;

import java.util.HashMap;
import java.util.Map;

import org.codelibs.fess.unit.UnitFessTestCase;

public class DocListTest extends UnitFessTestCase {
    public void test_DocList() {
        DocList docList = new DocList();

 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
package jcifs.internal.witness;

import jcifs.dcerpc.DcerpcMessage;
import jcifs.dcerpc.ndr.NdrBuffer;
import jcifs.dcerpc.ndr.NdrException;

/**
 * Base class for SMB Witness Protocol RPC messages as defined in MS-SWN specification.

 * either express or implied. See the License for the specific language
 * governing permissions and limitations under the License.
 */
package org.codelibs.fess.app.pager;

import java.io.Serializable;
import java.util.List;

import org.codelibs.fess.util.ComponentUtil;

/**
 * Pager for KeyMatch.
 */
public class KeyMatchPager implements Serializable {

    private static final long serialVersionUID = 1L;

 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.google.common.graph;

import com.google.common.annotations.Beta;
import com.google.errorprone.annotations.CanIgnoreReturnValue;
import org.jspecify.annotations.Nullable;

/**
 * A subinterface of {@link ValueGraph} which adds mutation methods. When mutation is not required,

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 */
package jcifs.internal.smb2.persistent;

import java.io.Serializable;
import java.util.Arrays;

import jcifs.internal.smb2.lease.Smb2LeaseKey;

/**
 * Information about a durable or persistent SMB handle.
 * This class holds all the necessary information to reconnect

 * governing permissions and limitations under the License.
 */
package org.codelibs.fess.util;

import java.util.HashMap;
import java.util.Map;

import org.codelibs.fess.exception.FessSystemException;
import org.codelibs.fess.unit.UnitFessTestCase;
import org.w3c.dom.NamedNodeMap;
import org.w3c.dom.Node;

public class PrunedTagTest extends UnitFessTestCase {

    public void test_hashCode() {