*
     * @return  the degree of concurrency
     */
    int getDegreeOfConcurrency();

    /**
     * Returns the start time of the session.
     *
     * @return the start time as an Instant object, never {@code null}
     */
    @Nonnull
    Instant getStartTime();

    /**
     * Gets the directory of the topmost project being built, usually the current directory or the

The module `items` will have a variable `router` (`items.router`). This is the same one we created in the file `app/routers/items.py`, it's an `APIRouter` object.

And then we do the same for the module `users`.

We could also import them like:

```Python
from app.routers import items, users
```

/// info

  /**
   * The current state of the service. This should be written with the lock held but can be read
   * without it because it is an immutable object in a volatile field. This is desirable so that
   * methods like {@link #state}, {@link #failureCause} and notably {@link #toString} can be run
   * without grabbing the lock.
   *

<span style="color: green;">INFO</span>:     Application startup complete.
```

</div>

/// note | "備考"

`uvicorn main:app`は以下を示します:

* `main`: `main.py`ファイル (Python "module")。
* `app`:  `main.py`内部で作られるobject（`app = FastAPI()`のように記述される）。
* `--reload`: コードの変更時にサーバーを再起動させる。開発用。

///

出力には次のような行があります:

```hl_lines="4"
INFO:     Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)
```

// Copyright (c) 2015-2021 MinIO, Inc.
//
// This file is part of MinIO Object Storage stack
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful

// Copyright (c) 2015-2023 MinIO, Inc.
//
// This file is part of MinIO Object Storage stack
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful

    return dotIndex == -1 ? fileName : fileName.substring(0, dotIndex);
  }

  /**
   * Deletes the file or directory at the given {@code path} recursively. Deletes symbolic links,
   * not their targets (subject to the caveat below).
   *
   * <p>If an I/O exception occurs attempting to read, open or delete any file under the given
   * directory, this method skips that file and continues. All such exceptions are collected and,

    return dotIndex == -1 ? fileName : fileName.substring(0, dotIndex);
  }

  /**
   * Deletes the file or directory at the given {@code path} recursively. Deletes symbolic links,
   * not their targets (subject to the caveat below).
   *
   * <p>If an I/O exception occurs attempting to read, open or delete any file under the given
   * directory, this method skips that file and continues. All such exceptions are collected and,

...

// Copyright (c) 2015-2021 MinIO, Inc.
//
// This file is part of MinIO Object Storage stack
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful