.body(protocol, "Hello")
        .build(),
    )

    val call = client.newCall(Request(server.url("/")))
    call.execute().use { originalResponse ->
      val responseBodyData = originalResponse.body.byteString()
      val responseTrailers = originalResponse.trailers()
      assertThat(responseTrailers).isEqualTo(headersOf("t1", "v1"))

      val rewrittenResponse =
        originalResponse
          .newBuilder()

import okhttp3.WebSocketListener
import okhttp3.logging.HttpLoggingInterceptor.Level
import okhttp3.testing.PlatformRule
import okio.Buffer
import okio.BufferedSink
import okio.ByteString.Companion.decodeBase64
import org.junit.jupiter.api.Assertions.fail
import org.junit.jupiter.api.Assumptions
import org.junit.jupiter.api.BeforeEach
import org.junit.jupiter.api.Test

    and `version`. This better suits HTTP/2 where the request line had to be synthesized from
    component headers.

 *  Breaking: Change `RecordedRequest.body` from a mutable `Buffer` to an immutable `ByteString`.

 *  Breaking: Adopt Okio's new `Socket` interface for `MockResponse.socketHandler`.

Note that any _Breaking_ changes above impact only APIs introduced in earlier 5.0.0-alpha releasees.