assertArgumentNotEmpty("className", className);

        return (T) newInstance(forName(className, loader));
    }

    /**
     * Returns whether the class can be assigned from another class.
     *
     * @param toClass
     *            The target class. Must not be {@literal null}.
     * @param fromClass
     *            The source class. Must not be {@literal null}.

      boolean sameComparator,
      Iterable<? extends Entry<? extends K, ? extends V>> entries) {
    // "adding" type params to an array of a raw type should be safe as
    // long as no one can ever cast that same array instance back to a
    // raw type.
    @SuppressWarnings("unchecked")
    Entry<K, V>[] entryArray = (Entry[]) Iterables.toArray(entries, EMPTY_ENTRY_ARRAY);

/*
 * © 2016 AgNO3 Gmbh & Co. KG
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of

/* jcifs smb client library in Java
 * Copyright (C) 2002  "Michael B. Allen" <jcifs at samba dot org>
 *                 "Eric Glass" <jcifs at samba dot org>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *

```

따라서 `Query`를 사용하면서 값을 필수로 선언해야 할 때는, 기본값을 선언하지 않으면 됩니다:

{* ../../docs_src/query_params_str_validations/tutorial006_an_py310.py hl[9] *}

### 필수지만 `None` 가능 { #required-can-be-none }

매개변수가 `None`을 허용하지만 여전히 필수라고 선언할 수 있습니다. 이렇게 하면 값이 `None`이더라도 클라이언트는 값을 반드시 전송해야 합니다.

이를 위해 `None`이 유효한 타입이라고 선언하되, 기본값은 선언하지 않으면 됩니다:

Depolanmış statik içerik olan "**container image**"ın aksine, "**container**" normalde çalışan instance'ı, yani **execute edilen** şeyi ifade eder.

    val client =
      client
        .newBuilder()
        .retryOnConnectionFailure(false)
        .build()

    // Seed the connection pool so we have something that can fail.
    val request1 = Request.Builder().url(server.url("/")).build()
    val response1 = client.newCall(request1).execute()
    assertThat(response1.body.string()).isEqualTo("abc")

   *         .put("one", 1)
   *         .putAll("several", 1, 2, 3)
   *         .putAll("many", 1, 2, 3, 4, 5)
   *         .build();
   * }
   *
   * <p>Builder instances can be reused; it is safe to call {@link #build} multiple times to build
   * multiple multimaps in series. Each multimap contains the key-value mappings in the previously
   * created multimaps.
   *
   * @since 2.0
   */

   * want a different order, consider using {@link #orderEntriesByValue(Comparator)}, which changes
   * this builder to sort entries by value.
   *
   * <p>Builder instances can be reused - it is safe to call {@link #buildOrThrow} multiple times to
   * build multiple bimaps in series. Each bimap is a superset of the bimaps created before it.
   *
   * @since 2.0
   */

q: Annotated[str | None, Query(min_length=3)] = None
```

因此，在使用 `Query` 的同时需要把某个值声明为必填时，只需不声明默认值：

{* ../../docs_src/query_params_str_validations/tutorial006_an_py310.py hl[9] *}

### 必填，但可以为 `None` { #required-can-be-none }

你可以声明一个参数可以接收 `None`，但它仍然是必填的。这将强制客户端必须发送一个值，即使该值是 `None`。

为此，你可以声明 `None` 是有效类型，但不声明默认值：

{* ../../docs_src/query_params_str_validations/tutorial006c_an_py310.py hl[9] *}