@JvmOverloads
  constructor(
    val requiredPlatformName: String? = null,
    val platform: Platform? = null,
  ) : BeforeEachCallback, AfterEachCallback, InvocationInterceptor {
    private val versionChecks = mutableListOf<Pair<Matcher<out Any>, Matcher<out Any>>>()

    override fun beforeEach(context: ExtensionContext) {
      setupPlatform()
    }

    override fun afterEach(context: ExtensionContext) {
      resetPlatform()
    }

 *
 * All start/connect/acquire events will eventually receive a matching end/release event, either
 * successful (non-null parameters), or failed (non-null throwable). The first common parameters of
 * each event pair are used to link the event in case of concurrent or repeated events e.g.
 * `dnsStart(call, domainName)` → `dnsEnd(call, domainName, inetAddressList)`.
 *
 * Events are typically nested with this structure:
 *

    }

    override fun convertType(type: KType): KType {
        val first = type.arguments.getOrNull(0)?.type ?: return type
        val second = type.arguments.getOrNull(1)?.type ?: return type
        return Pair::class.createType(
            arguments = listOf(
                KTypeProjection(
                    variance = KVariance.INVARIANT,
                    type = mappingConversionFirst.convertType(first)

```Python
{**note.dict()}
```

`**note.dict()` "unpacks" the key value pairs directly, so, `{**note.dict()}` would be, more or less, a copy of `note.dict()`.

And then, we extend that copy `dict`, adding another key-value pair: `"id": last_record_id`:

```Python
{**note.dict(), "id": last_record_id}
```

So, the final result returned would be something like:

```Python
{
    "id": 1,
    "text": "Some note",

  // Required.
  optional string type = 1;
}

// FlowSchema defines the schema of a group of flows. Note that a flow is made up of a set of inbound API requests with
// similar attributes and is identified by a pair of strings: the name of the FlowSchema and a "flow distinguisher".
message FlowSchema {
  // `metadata` is the standard object's metadata.

  // Required.
  optional string type = 1;
}

// FlowSchema defines the schema of a group of flows. Note that a flow is made up of a set of inbound API requests with
// similar attributes and is identified by a pair of strings: the name of the FlowSchema and a "flow distinguisher".
message FlowSchema {
  // `metadata` is the standard object's metadata.

    }


    private fun collectInheritancePath(
        baseSymbol: FirClassSymbol<*>,
        superSymbol: FirClassSymbol<*>,
    ): List<Pair<ConeClassLikeType, FirRegularClassSymbol>>? {
        val stack = mutableListOf<Pair<ConeClassLikeType, FirRegularClassSymbol>>()
        var result: List<Pair<ConeClassLikeType, FirRegularClassSymbol>>? = null

        fun dfs(symbol: FirClassSymbol<*>) {

  @ArgumentsSource(FileSystemParamProvider::class)
  fun emptyCache(parameters: Pair<FileSystem, Boolean>) {
    setUp(parameters.first, parameters.second)
    cache.close()
    assertJournalEquals()
  }

  @ParameterizedTest
  @ArgumentsSource(FileSystemParamProvider::class)
  fun recoverFromInitializationFailure(parameters: Pair<FileSystem, Boolean>) {
    setUp(parameters.first, parameters.second)

  private lateinit var server: MockWebServer
  private lateinit var client: OkHttpClient

  val listener = RecordingEventListener()

  fun setUp(mode: Pair<CancelMode, ConnectionType>) {
    this.cancelMode = mode.first
    this.connectionType = mode.second

    if (connectionType == H2) {
      platform.assumeHttp2Support()
    }

    printEvent("callStart");
  }

  @Override public void callEnd(Call call) {
    printEvent("callEnd");
  }

  ...
}
```

We can use this listener to race a pair of concurrent HTTP requests:

```java
Request washingtonPostRequest = new Request.Builder()
    .url("https://www.washingtonpost.com/")
    .build();
client.newCall(washingtonPostRequest).enqueue(new Callback() {