sourceFilesBaseName: String,
    hashTypeSourceName: java.util.function.Function<String, String>,
    classPath: List<File>,
    classPathDependencies: List<File>,
    apiSpec: java.util.function.Function<String, Boolean>,
    parameterNamesSupplier: java.util.function.Function<String, List<String>?>,
    sinceSupplier: java.util.function.Function<String, String?>,
): List<File> =

    apiTypeProviderFor(
        asmLevel,

{!../../../docs_src/custom_response/tutorial008.py!}
```

1. This is the generator function. It's a "generator function" because it contains `yield` statements inside.
2. By using a `with` block, we make sure that the file-like object is closed after the generator function is done. So, after it finishes sending the response.

## Other Asynchronous Function Calls

As the testing function is now asynchronous, you can now also call (and `await`) other `async` functions apart from sending requests to your FastAPI application in your tests, exactly as you would call them anywhere else in your code.

!!! tip

### Other utility functions

Any other utility function that you call directly can be created with normal `def` or `async def` and FastAPI won't affect the way you call it.

This is in contrast to the functions that FastAPI calls for you: *path operation functions* and dependencies.

!!! tip
    You'll see what other "things", apart from functions, can be used as dependencies in the next chapter.

Whenever a new request arrives, **FastAPI** will take care of:

* Calling your dependency ("dependable") function with the correct parameters.
* Get the result from your function.
* Assign that result to the parameter in your *path operation function*.

```mermaid
graph TB

            token,
        )
    }
    add(FirErrors.FUNCTION_EXPECTED) { firDiagnostic ->
        FunctionExpectedImpl(
            firDiagnostic.a,
            firSymbolBuilder.typeBuilder.buildKtType(firDiagnostic.b),
            firDiagnostic as KtPsiDiagnostic,
            token,
        )
    }
    add(FirErrors.INTERFACE_AS_FUNCTION) { firDiagnostic ->
        InterfaceAsFunctionImpl(

    rect rgba(0, 255, 0, .1)
        code ->> function: say_hi(name="Camila")
        function ->> execute: führe Code der Funktion aus
        execute ->> code: gib das Resultat zurück
    end

    rect rgba(0, 255, 255, .1)
        code ->> function: say_hi(name="Camila")
        function ->> code: gib das gespeicherte Resultat zurück
    end

    rect rgba(0, 255, 0, .1)

- [`KT-55945`](https://youtrack.jetbrains.com/issue/KT-55945) NoSuchMethodError when calling method with value class parameter on java class inherited from kotlin class
- [`KT-58840`](https://youtrack.jetbrains.com/issue/KT-58840) K1/K2: false positive EXPOSED_FUNCTION_RETURN_TYPE related to protected lower bound

      contentType: MediaType? = null,
      contentLength: Long = -1L,
    ): ResponseBody = commonAsResponseBody(contentType, contentLength)

    @JvmStatic
    @Deprecated(
      message = "Moved to extension function. Put the 'content' argument first to fix Java",
      replaceWith =
        ReplaceWith(
          expression = "content.toResponseBody(contentType)",
          imports = ["okhttp3.ResponseBody.Companion.toResponseBody"],

The [SliceAt(typ Type, p unsafe.Pointer, len int)] function
returns a Value representing a slice whose underlying array starts