return forward.contains(object);
  }

  @Override
  public int size() {
    return forward.size();
  }

  @Override
  public UnmodifiableIterator<E> iterator() {
    return forward.descendingIterator();
  }

  @Override
  ImmutableSortedSet<E> headSetImpl(E toElement, boolean inclusive) {
    return forward.tailSet(toElement, inclusive).descendingSet();
  }

import static org.hamcrest.CoreMatchers.notNullValue;
import static org.hamcrest.CoreMatchers.sameInstance;
import static org.junit.Assert.assertThat;

import java.net.URL;
import java.net.URLClassLoader;
import java.util.Iterator;

import junit.framework.TestCase;

import org.junit.Test;

/**
 * @author koichik
 */
public class ClassLoaderUtilTest {

    /**
     * @throws Exception
     */
    @Test

    private List<Restriction> intersection(List<Restriction> r1, List<Restriction> r2) {
        List<Restriction> restrictions = new ArrayList<>(r1.size() + r2.size());
        Iterator<Restriction> i1 = r1.iterator();
        Iterator<Restriction> i2 = r2.iterator();
        Restriction res1 = i1.next();
        Restriction res2 = i2.next();

        boolean done = false;
        while (!done) {

        handler -->> client: HTTP-Error-Response
    end
    operation ->> client: Sendet Response an Client
    Note over client,operation: Response wurde gesendet, kann nicht mehr geändert werden
    opt Tasks
        operation -->> tasks: Sendet Hintergrundtasks
    end
    opt Löst andere Exception aus
        tasks -->> tasks: Handhabt Exception im Hintergrundtask-Code
    end
```

/// info

# `UploadFile` class

You can define *path operation function* parameters to be of the type `UploadFile` to receive files from the request.

You can import it directly from `fastapi`:

```python
from fastapi import UploadFile
```

::: fastapi.UploadFile
    options:
        members:
            - file
            - filename
            - size
            - headers
            - content_type
            - read

import static org.codelibs.core.misc.AssertionUtil.assertArgumentNotNull;

import java.io.IOException;
import java.lang.reflect.Method;
import java.net.URL;
import java.util.Enumeration;
import java.util.Iterator;

import org.codelibs.core.collection.EnumerationIterator;
import org.codelibs.core.exception.ClIllegalStateException;
import org.codelibs.core.exception.ClassNotFoundRuntimeException;

さらに、こうした何千もの *path operations* は、たった3行で表現できるのです:

```Python hl_lines="30-32"
{!../../docs_src/security/tutorial002.py!}
```

## まとめ

これで、 *path operation関数* の中で直接現在のユーザーを取得できるようになりました。

既に半分のところまで来ています。

あとは、 `username` と `password` を実際にそのユーザーやクライアントに送る、 *path operation* を追加する必要があるだけです。

If you click the lock icon and logout, and then try the same operation again, you will get an HTTP 401 error of:

```JSON
{
  "detail": "Not authenticated"
}
```

### Inactive user

Now try with an inactive user, authenticate with:

User: `alice`

Password: `secret2`

And try to use the operation `GET` with the path `/users/me`.

You will get an "Inactive user" error, like:

		return "Unknown"
	}
}

// InsufficientReadQuorum storage cannot satisfy quorum for read operation.
type InsufficientReadQuorum struct {
	Bucket string
	Object string
	Err    error
	Type   RQErrType
}

func (e InsufficientReadQuorum) Error() string {
	return "Storage resources are insufficient for the read operation " + e.Bucket + "/" + e.Object
}

// Unwrap the error.

   * half of that is more awkward to arrange...
   */
  private static <T> Iterable<T> iterable(final Collection<T> collection) {
    // return collection::iterator;
    return new Iterable<T>() {
      @Override
      public Iterator<T> iterator() {
        return collection.iterator();
      }
    };
  }

  public void testEquals() {
    new EqualsTester()
        .addEqualityGroup(ImmutableDoubleArray.of())