```Python hl_lines="3  25"
{!../../docs_src/openapi_callbacks/tutorial001.py!}
```

### Create the callback *path operation*

To create the callback *path operation* use the same `APIRouter` you created above.

It should look just like a normal FastAPI *path operation*:

* It should probably have a declaration of the body it should receive, e.g. `body: InvoiceEvent`.

        }

        @Override
        public void forEach(final ResourceHandler handler) {
            ResourceTraversalUtil.forEach(jarFile, (ResourceHandler) (path, is) -> {
                if (rootDir == null || path.startsWith(rootDir)) {
                    handler.processResource(path, is);
                }
            });
        }

        @Override
        public void close() {
            JarFileUtil.close(jarFile);

    VersionsMetadata(Artifact artifact, Date timestamp) {
        super(createRepositoryMetadata(artifact), (Path) null, timestamp);
        this.artifact = artifact;
    }

    VersionsMetadata(Artifact artifact, Path path, Date timestamp) {
        super(createRepositoryMetadata(artifact), path, timestamp);
        this.artifact = artifact;
    }

    private static Metadata createRepositoryMetadata(Artifact artifact) {

import jcifs.smb1.util.Hexdump;

class Trans2QueryPathInformation extends SmbComTransaction {

    private int informationLevel;

    Trans2QueryPathInformation( String filename, int informationLevel ) {
        path = filename;
        this.informationLevel = informationLevel;
        command = SMB_COM_TRANSACTION2;
        subCommand = TRANS2_QUERY_PATH_INFORMATION;
        totalDataCount = 0;
        maxParameterCount = 2;

        authMap.put(auth.getPathPrefix(), auth);
    }

    public SmbAuthentication get(final String path) {
        if (path == null) {
            return null;
        }

        for (final Map.Entry<String, SmbAuthentication> entry : authMap.entrySet()) {
            if (path.startsWith(entry.getKey())) {
                return entry.getValue();
            }
        }
        return null;
    }

     */
    @Override
    public void setPath ( String path ) {
        if ( path.length() > 0 && path.charAt(0) == '\\' ) {
            path = path.substring(1);
        }
        // win8.1 returns ACCESS_DENIED if the trailing backslash is included
        if ( path.length() > 1 && path.charAt(path.length() - 1) == '\\' ) {
            path = path.substring(0, path.length() - 1);
        }
        this.name = path;
    }

 */
public class SmbComDelete extends ServerMessageBlock {

    private int searchAttributes;


    /**
     * 
     * @param config
     * @param path
     */
    public SmbComDelete ( Configuration config, String path ) {
        super(config, SMB_COM_DELETE, path);
        this.searchAttributes = SmbConstants.ATTR_HIDDEN | SmbConstants.ATTR_HIDDEN | SmbConstants.ATTR_SYSTEM;
    }


    @Override

## Смешивание query-параметров и path-параметров

Вы можете объявлять несколько query-параметров и path-параметров одновременно,**FastAPI** сам разберётся, что чем является.

И вы не обязаны объявлять их в каком-либо определенном порядке.

Они будут обнаружены по именам:

@Warmup(iterations = 3)
@Measurement(time = 10)
public class Xpp3DomPerfTest {
    @State(Scope.Benchmark)
    public static class AdditionState {
        List<Path> poms;

        @Setup(Level.Iteration)
        public void setUp() throws IOException {
            Path userHome = Paths.get(System.getProperty("user.home"));
            poms = Files.walk(userHome.resolve(".m2/repository/org/apache/maven"))

```

////

/// note | "📡 ℹ"

`Header` "👭" 🎓 `Path`, `Query` & `Cookie`. ⚫️ 😖 ⚪️➡️ 🎏 ⚠ `Param` 🎓.

✋️ 💭 👈 🕐❔ 👆 🗄 `Query`, `Path`, `Header`, & 🎏 ⚪️➡️ `fastapi`, 👈 🤙 🔢 👈 📨 🎁 🎓.

///

/// info

📣 🎚, 👆 💪 ⚙️ `Header`, ↩️ ⏪ 🔢 🔜 🔬 🔢 🔢.

///

## 🏧 🛠️

`Header` ✔️ 🐥 ➕ 🛠️ 🔛 🔝 ⚫️❔ `Path`, `Query` & `Cookie` 🚚.

🌅 🐩 🎚 🎏 "🔠" 🦹, 💭 "➖ 🔣" (`-`).