assertThrows(ConcurrentModificationException.class, () -> iterator.next());
  }

  @CollectionFeature.Require({SUPPORTS_ADD, FAILS_FAST_ON_CONCURRENT_MODIFICATION})
  public void testSetCountZeroToOneConcurrentWithEntrySetIteration() {
    Iterator<Entry<E>> iterator = getMultiset().entrySet().iterator();
    assertSetCount(e3(), 1);
    assertThrows(ConcurrentModificationException.class, () -> iterator.next());
  }

# `APIRouter` class

Here's the reference information for the `APIRouter` class, with all its parameters, attributes and methods.

You can import the `APIRouter` class directly from `fastapi`:

```python
from fastapi import APIRouter
```

::: fastapi.APIRouter
    options:
        members:
            - websocket
            - include_router
            - get
            - put
            - post
            - delete

    public ValueSetLink<K, V> getPredecessorInValueSet() {
      return requireNonNull(predecessorInValueSet); // see the comment on the class fields
    }

    @Override
    public ValueSetLink<K, V> getSuccessorInValueSet() {
      return requireNonNull(successorInValueSet); // see the comment on the class fields
    }

    @Override
    public void setPredecessorInValueSet(ValueSetLink<K, V> entry) {

<img src="/img/python-types/image06.png">

Notice that this means "`one_person` is an **instance** of the class `Person`".

It doesn't mean "`one_person` is the **class** called `Person`".

## Pydantic models

<a href="https://docs.pydantic.dev/" class="external-link" target="_blank">Pydantic</a> is a Python library to perform data validation.

 *         getType: 2
 *     getTypeText: Domain group
 *   getDomainName: WNET
 *  getAccountName: Domain Admins
 * </pre>
 * 
 * @internal
 */
public class SID extends rpc.sid_t implements jcifs.SID {

    private static final Logger log = LoggerFactory.getLogger(SID.class);

    static final String[] SID_TYPE_NAMES = {
        "0", "User", "Domain group", "Domain", "Local group", "Builtin group", "Deleted", "Invalid", "Unknown"
    };

🎛 👆 💪 ⚙️ 🤝 ❎ 🗳:

* Traefik (👈 💪 🍵 📄 🔕)
* 📥 (👈 💪 🍵 📄 🔕)
* 👌
* ✳

## ➡️ 🗜

⏭ ➡️ 🗜, 👫 **🇺🇸🔍 📄** 💲 💙 🥉 🥳.

🛠️ 📎 1️⃣ 👫 📄 ⚙️ ⚠, 🚚 📠 & 📄 😥.

✋️ ⤴️ **<a href="https://letsencrypt.org/" class="external-link" target="_blank">➡️ 🗜</a>** ✍.

/**
 * This class encapsulates the logic for switching tree connections
 * 
 * Switching trees can occur either when the tree has been disconnected by failure or idle-timeout - as well as on
 * DFS referrals.
 * 
 * @author mbechler
 *
 */
class SmbTreeConnection {

    private static final Logger log = LoggerFactory.getLogger(SmbTreeConnection.class);

    private final CIFSContext ctx;

import org.lastaflute.web.Execute;
import org.lastaflute.web.response.JsonResponse;

/**
 * @author shinsuke
 */
public class ApiAdminAccesstokenAction extends FessApiAdminAction {

    private static final Logger logger = LogManager.getLogger(ApiAdminAccesstokenAction.class);

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

import org.lastaflute.web.response.JsonResponse;

import jakarta.annotation.Resource;

/**
 * @author Keiichi Watanabe
 */
public class ApiAdminReqheaderAction extends FessApiAdminAction {

    private static final Logger logger = LogManager.getLogger(ApiAdminReqheaderAction.class);

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

import org.lastaflute.web.response.JsonResponse;

import jakarta.annotation.Resource;

/**
 * @author Keiichi Watanabe
 */
public class ApiAdminWebauthAction extends FessApiAdminAction {

    private static final Logger logger = LogManager.getLogger(ApiAdminWebauthAction.class);

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