This defines the name of the query parameter that should be provided in the request
    with the API key and integrates that into the OpenAPI documentation. It extracts
    the key value sent in the query parameter automatically and provides it as the
    dependency result. But it doesn't define how to send that API key to the client.

    ## Usage

    Create an instance object and use that object as the dependency in `Depends()`.

{* ../../docs_src/first_steps/tutorial001_py39.py hl[7] *}

This is a Python function.

It will be called by **FastAPI** whenever it receives a request to the URL "`/`" using a `GET` operation.

In this case, it is an `async` function.

---

You could also define it as a normal function instead of `async def`:

{* ../../docs_src/first_steps/tutorial003_py39.py hl[7] *}

/// note

When you request a URL with OkHttp, here's what it does:

 1. It uses the URL and configured OkHttpClient to create an **address**. This address specifies how we'll connect to the webserver.
 2. It attempts to retrieve a connection with that address from the **connection pool**.

        return contributorLines
            .map { it.trim() }
            .filter { it.isNotEmpty() }
            .onEach { check(contributorLineRegex.containsMatchIn(it)) { "Invalid contributor line: $it" } }
            .map { GitHubUser(contributorLineRegex.find(it)!!.groupValues[2], contributorLineRegex.find(it)!!.groupValues[1]) }
            .toSet()
    }

    /**

        val originalChanges = loadChanges()
        val sortedChanges = originalChanges.mapValues {
            sortChanges(it.value)
        }

        val mismatches = originalChanges.mapValues {
            findMismatches(it.value, sortedChanges[it.key]!!)
        }.filterValues {
            it.isNotEmpty()
        }

        if (mismatches.isNotEmpty()) {

        {
            it.includedClasses = toPatterns(PublicApi.includes + PublicKotlinDslApi.includes)
            it.excludedClasses = toPatterns(PublicApi.excludes + PublicKotlinDslApi.excludes)

            it.title = "Binary compatibility report for Gradle ${isSnapshot.get() ? "${baseVersion.get()}-SNAPSHOT" : version} since ${compatibilityBaselineVersion}"

/// tip

This is a toy example to demonstrate how it works, if you need Gzip support, you can use the provided [`GzipMiddleware`](../advanced/middleware.md#gzipmiddleware){.internal-link target=_blank}.

///

First, we create a `GzipRequest` class, which will overwrite the `Request.body()` method to decompress the body in the presence of an appropriate header.

If there's no `gzip` in the header, it will not try to decompress the body.

// the runtime manually, though any memory obtained from freed arenas must
// not be accessed once that happens. An Arena is automatically freed once
// it is no longer referenced, so it must be kept alive (see runtime.KeepAlive)
// until any memory allocated from it is no longer needed.
//
// An Arena must never be used concurrently by multiple goroutines.
type Arena struct {
	a unsafe.Pointer
}

            parallelizationMethod,
            subprojects.map { it.name },
        )

    override fun getName(testCoverage: TestCoverage) =
        truncateName("${testCoverage.asName()} (${subprojects.joinToString(",") { it.name }})")

    override fun getDescription(testCoverage: TestCoverage) = "${testCoverage.asName()} for ${subprojects.joinToString(", ") { it.name }}"

    assertThat(events2).isEqualTo(expectedEvents2)
  }

  private fun isConnectionEvent(it: CallEvent?) =
    it is CallStart ||
      it is CallEnd ||
      it is ConnectStart ||
      it is ConnectEnd ||
      it is ConnectionAcquired ||
      it is ConnectionReleased ||
      it is Canceled ||
      it is RequestFailed ||
      it is ResponseFailed

  private fun sleep(delayMillis: Int) {
    try {