### Update a Hero with `HeroUpdate` { #update-a-hero-with-heroupdate }

We can **update a hero**. For this we use an HTTP `PATCH` operation.

And in the code, we get a `dict` with all the data sent by the client, **only the data sent by the client**, excluding any values that would be there just for being the default values. To do it we use `exclude_unset=True`. This is the main trick. 🪄

  /*
   * We have some considerable complexity in these create methods because of
   * Builder.buildKeepingLast(). The same Builder might be called with buildKeepingLast() and then
   * buildOrThrow(), or vice versa. So in particular, if we modify alternatingKeysAndValues to
   * eliminate duplicate keys (for buildKeepingLast()) then we have to ensure that a later call to

## Developing

If you already cloned the <a href="https://github.com/fastapi/fastapi" class="external-link" target="_blank">fastapi repository</a> and you want to deep dive in the code, here are some guidelines to set up your environment.

### Virtual environment

           * within a `try` block, then an error might be thrown even before we enter the `try`
           * block: https://github.com/google/truth/issues/333#issuecomment-765652454
           *
           * Also, it's nice that this approach should let us catch *only* ClassNotFoundException
           * instead of having to catch more broadly (potentially even including, say, a
           * StackOverflowError).
           */

import jcifs.dcerpc.rpc;
import jcifs.dcerpc.ndr.NdrBuffer;
import jcifs.dcerpc.ndr.NdrException;
import jcifs.dcerpc.ndr.NdrObject;

/**
 * Security Account Manager Remote (SAMR) protocol implementation.
 * This class provides DCE/RPC interface for SAM database operations including
 * user account management, group operations, and domain security functions.
 */
@SuppressWarnings("all")
public class samr {

    /**

import jcifs.smb1.dcerpc.ndr.NdrBuffer;
import jcifs.smb1.dcerpc.ndr.NdrException;
import jcifs.smb1.dcerpc.ndr.NdrObject;

/**
 * Security Account Manager Remote (SAMR) protocol implementation for SMB1.
 * This class provides DCE/RPC interface for SAM database operations including
 * user account management, group operations, and domain security functions.
 */
public class samr {

    /**

import org.codelibs.fess.crawler.entity.OpenSearchAccessResult;
import org.codelibs.fess.crawler.extractor.ExtractorFactory;
import org.codelibs.fess.crawler.service.DataService;
import org.codelibs.fess.dict.DictionaryManager;
import org.codelibs.fess.ds.DataStoreFactory;
import org.codelibs.fess.exception.ContainerNotAvailableException;
import org.codelibs.fess.helper.AccessTokenHelper;
import org.codelibs.fess.helper.ActivityHelper;

```JSON
{
  "detail": "Item not found"
}
```

/// tip | 豆知識

`HTTPException`を発生させる際には、`str`だけでなく、JSONに変換できる任意の値を`detail`パラメータとして渡すことができます。

`dict`や`list`などを渡すことができます。

これらは **FastAPI** によって自動的に処理され、JSONに変換されます。

///

## カスタムヘッダーの追加

例えば、いくつかのタイプのセキュリティのために、HTTPエラーにカスタムヘッダを追加できると便利な状況がいくつかあります。

おそらくコードの中で直接使用する必要はないでしょう。

         * unlikely that cancel() will be slow, so we can probably get away with calling it while
         * holding a lock. Still, it would be nice to avoid somehow.
         */
        lock.lock();
        try {
          currentFuture.cancel(mayInterruptIfRunning);
        } finally {
          lock.unlock();
        }
      }

            }
            else -> {
              // Ignore an unexpected pong.
            }
          }
        }
      } else {
        // Send a reply to a client ping if this is a server and vice versa.
        writerQueue.execute("$connectionName ping") {
          writePing(true, payload1, payload2)
        }
      }
    }

    override fun goAway(
      lastGoodStreamId: Int,