override fun read(
      sink: Buffer,
      byteCount: Long,
    ): Long {
      while (left == 0) {
        source.skip(padding.toLong())
        padding = 0
        if (flags and FLAG_END_HEADERS != 0) return -1L
        readContinuationHeader()
        // TODO: test case for empty continuation header?
      }

      val read = source.read(sink, minOf(byteCount, left.toLong()))

    set("k1", "a", "a")

    // Create an editor, then detach it.
    val editor = cache.edit("k1")!!
    editor.newSink(0).buffer().use { sink ->
      cache.evictAll()

      // Complete the original edit. It goes into a black hole.
      sink.writeUtf8("bb")
    }
    assertThat(cache["k1"]).isNull()
  }

  @ParameterizedTest
  @ArgumentsSource(FileSystemParamProvider::class)

import okhttp3.internal.tls.CertificateChainCleaner
import okhttp3.internal.tls.OkHostnameVerifier
import okhttp3.internal.toImmutableList
import okhttp3.internal.unmodifiable
import okhttp3.internal.ws.RealWebSocket
import okio.Sink
import okio.Source
import org.codehaus.mojo.animal_sniffer.IgnoreJRERequirement

/**
 * Factory for [calls][Call], which can be used to send HTTP requests and read their responses.
 *

errors.app.db.already.updated = Es wurde möglicherweise von einem anderen Prozess aktualisiert. Bitte versuchen Sie den Vorgang erneut.
errors.app.db.already.exists = Die Daten sind bereits vorhanden. Bitte versuchen Sie den Vorgang erneut.
errors.app.double.submit.request = Es wurde möglicherweise vor dieser Anfrage verarbeitet. Bitte versuchen Sie den Vorgang erneut.

 * multiple simultaneous reads.)
 *
 * @param file a file in the directory to check. This file shouldn't already exist!
 */
internal fun FileSystem.isCivilized(file: Path): Boolean {
  sink(file).use {
    try {
      delete(file)
      return true
    } catch (_: IOException) {
    }
  }
  delete(file)
  return false
}

/** Delete file we expect but don't require to exist. */

        return new String(factory.getSinkContents(), UTF_8);
      }

      @Override
      public String getExpected(String data) {
        /*
         * Get what the byte sink factory would expect for no written bytes, then append expected
         * string to that.
         */
        byte[] factoryExpectedForNothing = factory.getExpected(new byte[0]);

Gryphon went on.  `Or would you like the Mock Turtle to sing you
a song?'

  `Oh, a song, please, if the Mock Turtle would be so kind,'
Alice replied, so eagerly that the Gryphon said, in a rather
offended tone, `Hm!  No accounting for tastes!  Sing her
"Turtle Soup," will you, old fellow?'

  The Mock Turtle sighed deeply, and began, in a voice sometimes
choked with sobs, to sing this:--

  var writeBytesMaximum: Long = peerSettings.initialWindowSize.toLong()
    private set

  internal val socket: BufferedSocket = builder.socket
  val writer = Http2Writer(socket.sink, client)

  // Visible for testing
  val readerRunnable = ReaderRunnable(Http2Reader(socket.source, client))

  // Guarded by this.
  private val currentPushRequests = mutableSetOf<Int>()

  init {

        override fun contentLength(): Long = TODO()

        override fun isDuplex(): Boolean = TODO()

        override fun isOneShot(): Boolean = TODO()

        override fun writeTo(sink: BufferedSink) = TODO()
      }
    requestBody = "".toRequestBody(null)
    requestBody = "".toRequestBody("".toMediaTypeOrNull())
    requestBody = ByteString.EMPTY.toRequestBody(null)

    This simple option dramatically changes the behavior of the request body and of the entire
    call.

    The `RequestBody.writeTo()` method may now retain a reference to the provided sink and
    hand it off to another thread to write to it after `writeTo` returns.

    The `EventListener` may now see requests and responses interleaved in ways not previously