- そのため、画像・動画・大きなバイナリなどの大きなファイルでも、メモリを使い果たすことなくうまく動作します。
- アップロードされたファイルからメタデータを取得できます。
- [file-like](https://docs.python.org/3/glossary.html#term-file-like-object) な `async` インターフェースを持ちます。
- 実際の Python の [`SpooledTemporaryFile`](https://docs.python.org/3/library/tempfile.html#tempfile.SpooledTemporaryFile) オブジェクトを公開しており、file-like オブジェクトを期待する他のライブラリにそのまま渡せます。

### `UploadFile` { #uploadfile }

`UploadFile` には次の属性があります:

"_If you're looking to learn one **modern framework** for building REST APIs, check out **FastAPI** [...] It's fast, easy to use and easy to learn [...]_"

"_We've switched over to **FastAPI** for our **APIs** [...] I think you'll like it [...]_"

         * Future might not even be a ListenableFuture, just a plain Future. That said, similar
         * problems can exist with methods like FutureTask.done(), not to mention slow calls to
         * Thread.interrupt() (as discussed in InterruptibleTask). At the end of the day, it's

"_If you're looking to learn one **modern framework** for building REST APIs, check out **FastAPI** [...] It's fast, easy to use and easy to learn [...]_"

"_We've switched over to **FastAPI** for our **APIs** [...] I think you'll like it [...]_"

import org.jspecify.annotations.NullUnmarked;
import org.jspecify.annotations.Nullable;

/**
 * Tester that runs automated sanity tests for any given class. A typical use case is to test static
 * factory classes like:
 *
 * <pre>
 * interface Book {...}
 * public class Books {
 *   public static Book hardcover(String title) {...}
 *   public static Book paperback(String title) {...}
 * }
 * </pre>
 *

 *       doing something and finally closing the stream that was opened.
 * </ul>
 *
 * <p><b>Note:</b> In general, {@code ByteSource} is intended to be used for "file-like" sources
 * that provide streams that are:
 *
 * <ul>
 *   <li><b>Finite:</b> Many operations, such as {@link #size()} and {@link #read()}, will either

 * Null row keys, columns keys, and values are not supported.
 *
 * <p>Lookups by row key are often faster than lookups by column key, because the data is stored in
 * a {@code Map<R, Map<C, V>>}. A method call like {@code column(columnKey).get(rowKey)} still runs
 * quickly, since the row key is provided. However, {@code column(columnKey).size()} takes longer,
 * since an iteration across all row keys occurs.
 *

 *
 * @since 33.4.0 (but since 21.0 in the JRE flavor)
 */
@GwtCompatible
/*
 * Users will use most of these methods only if they're already using Stream. For a few other
 * methods, like stream(Iterable), we have to rely on users not to call them without library
 * desugaring.
 */
@IgnoreJRERequirement
public final class Streams {
  /**

 *     normally {@code Object} unless it is constrained by using a method like {@link
 *     #removalListener}. Cache keys may not be null.
 * @param <V> the most general value type this builder will be able to create caches for. This is
 *     normally {@code Object} unless it is constrained by using a method like {@link
 *     #removalListener}. Cache values may not be null.
 * @author Charles Fry

        MessageUtils.setColorEnabled(
                context.coloredOutput != null ? context.coloredOutput : !Terminal.TYPE_DUMB.equals(terminal.getType()));

        // handle rawStreams: some would like to act on true, some on false
        if (context.options().rawStreams().orElse(false)) {
            doConfigureWithTerminalWithRawStreamsEnabled(context);
        } else {