val response = call.execute()
    assertThat(response.body.string()).isEqualTo("ABC")
    assertThat(response.protocol).isEqualTo(protocol)

    // Confirm a single ping was sent and received, and its reply was sent and received.
    val logs = testLogHandler.takeAll()
    assertThat(countFrames(logs, "FINE: >> 0x00000000     8 PING          "))
      .isEqualTo(1)

 *  New: `okhttp-sse` is an early preview of Server-Sent Events (SSE). This feature is incomplete
    and is only suitable for experimental use.
 *  New: MockWebServer now supports client authentication (mutual TLS). Call `requestClientAuth()`
    to permit an optional client certificate or `requireClientAuth()` to require one.
 *  New: `RecordedRequest.getHandshake()` returns the HTTPS handshake of a request sent to
    `MockWebServer`.

import okhttp3.internal.url.FRAGMENT_ENCODE_SET
import okhttp3.internal.url.FRAGMENT_ENCODE_SET_URI
import okhttp3.internal.url.PASSWORD_ENCODE_SET
import okhttp3.internal.url.PATH_SEGMENT_ENCODE_SET
import okhttp3.internal.url.PATH_SEGMENT_ENCODE_SET_URI
import okhttp3.internal.url.QUERY_COMPONENT_ENCODE_SET
import okhttp3.internal.url.QUERY_COMPONENT_ENCODE_SET_URI
import okhttp3.internal.url.QUERY_COMPONENT_REENCODE_SET

     *
     * **This is an evolving set.** Future releases include support for transitional
     * protocols. The http/1.1 transport will never be dropped.
     *
     * If multiple protocols are specified, [ALPN][alpn] will be used to negotiate a transport.
     * Protocol negotiation is only attempted for HTTPS URLs.
     *
     * [Protocol.HTTP_1_0] is not supported in this set. Requests are initiated with `HTTP/1.1`. If

	public final fun removeAll (Ljava/lang/String;)Lokhttp3/Headers$Builder;
	public final fun set (Ljava/lang/String;Ljava/lang/String;)Lokhttp3/Headers$Builder;
	public final fun set (Ljava/lang/String;Ljava/time/Instant;)Lokhttp3/Headers$Builder;
	public final fun set (Ljava/lang/String;Ljava/util/Date;)Lokhttp3/Headers$Builder;
}

public final class okhttp3/Headers$Companion {

    assertThat(connection.writer.maxDataLength()).isEqualTo(newMaxFrameSize)
  }

  /**
   * Webservers may set the initial window size to zero, which is a special case because it means
   * that we have to flush headers immediately before any request body can be sent.
   * https://github.com/square/okhttp/issues/2543
   */
  @Test fun peerSetsZeroFlowControl() {
    peer.setClient(true)