return -1; // We don't know the compressed length in advance!
      }

      @Override public void writeTo(BufferedSink sink) throws IOException {
        BufferedSink gzipSink = Okio.buffer(new GzipSink(sink));
        body.writeTo(gzipSink);
        gzipSink.close();
      }
    };
  }
}
```

### Rewriting Responses

import okhttp3.internal.commonIsDuplex
import okhttp3.internal.commonIsOneShot
import okhttp3.internal.commonToRequestBody
import okio.BufferedSink
import okio.ByteString
import okio.FileSystem
import okio.GzipSink
import okio.Path
import okio.buffer
import okio.source

abstract class RequestBody {
  /** Returns the Content-Type header for this body. */
  abstract fun contentType(): MediaType?

  /**

import okhttp3.ResponseBody.Companion.toResponseBody
import okhttp3.TestUtil.assertSuppressed
import okio.Buffer
import okio.BufferedSink
import okio.ForwardingSink
import okio.ForwardingSource
import okio.GzipSink
import okio.Sink
import okio.Source
import okio.buffer
import org.junit.jupiter.api.BeforeEach
import org.junit.jupiter.api.Tag
import org.junit.jupiter.api.Test

import okio.Buffer
import okio.BufferedSink
import okio.BufferedSource
import okio.ByteString
import okio.ByteString.Companion.decodeHex
import okio.ByteString.Companion.encodeUtf8
import okio.GzipSink
import okio.buffer
import org.junit.jupiter.api.Test

class Http2Test {
  val frame = Buffer()
  val reader = Http2Reader(frame, false)
  val expectedStreamId = 15

  @Test fun unknownFrameTypeSkipped() {

    return client.newCall(request).execute()
  }

  /** Returns a gzipped copy of `bytes`.  */
  fun gzip(data: String?): Buffer {
    val result = Buffer()
    val gzipSink = GzipSink(result).buffer()
    gzipSink.writeUtf8(data!!)
    gzipSink.close()
    return result
  }

  private fun assertContent(
    expected: String,
    response: Response,
    limit: Int = Int.MAX_VALUE,
  ) {

import okhttp3.java.net.cookiejar.JavaNetCookieJar
import okhttp3.testing.PlatformRule
import okio.Buffer
import okio.FileSystem
import okio.ForwardingFileSystem
import okio.GzipSink
import okio.Path
import okio.Path.Companion.toPath
import okio.buffer
import okio.fakefilesystem.FakeFileSystem
import okio.use
import org.junit.jupiter.api.AfterEach
import org.junit.jupiter.api.BeforeEach

import okhttp3.internal.discard
import okhttp3.testing.Flaky
import okhttp3.testing.PlatformRule
import okhttp3.tls.HandshakeCertificates
import okio.Buffer
import okio.BufferedSink
import okio.GzipSink
import okio.Path.Companion.toPath
import okio.buffer
import okio.fakefilesystem.FakeFileSystem
import org.junit.jupiter.api.AfterEach
import org.junit.jupiter.api.Assertions.assertArrayEquals

import okhttp3.testing.PlatformRule
import okhttp3.tls.HandshakeCertificates
import okhttp3.tls.HeldCertificate
import okio.Buffer
import okio.BufferedSink
import okio.ForwardingSource
import okio.GzipSink
import okio.Path.Companion.toPath
import okio.buffer
import okio.fakefilesystem.FakeFileSystem
import okio.use
import org.junit.jupiter.api.AfterEach
import org.junit.jupiter.api.Assertions.assertArrayEquals