assertContent("This is the 2nd server!", response)
    assertThat(response.request.url).isEqualTo(
      server2.url("/"),
    )

    // make sure the first server was careful to recycle the connection
    assertContent("This is the first server again!", getResponse(Request(server.url("/"))))
    assertContent("This is the 2nd server, again!", getResponse(Request(server2.url("/"))))

     */
    fun dispatcher(dispatcher: Dispatcher) =
      apply {
        this.dispatcher = dispatcher
      }

    /**
     * Sets the connection pool used to recycle HTTP and HTTPS connections.
     *
     * If unset, a new connection pool will be used.
     */
    fun connectionPool(connectionPool: ConnectionPool) =
      apply {
        this.connectionPool = connectionPool

HSPLokio/Segment;->writeTo(Lokio/Segment;I)V
HSPLokio/SegmentPool;-><clinit>()V
HSPLokio/SegmentPool;-><init>()V
HSPLokio/SegmentPool;->firstRef()Ljava/util/concurrent/atomic/AtomicReference;
HSPLokio/SegmentPool;->recycle(Lokio/Segment;)V
HSPLokio/SegmentPool;->take()Lokio/Segment;
HSPLokio/SocketAsyncTimeout;-><init>(Ljava/net/Socket;)V
HSPLokio/Timeout$Companion$NONE$1;-><init>()V
HSPLokio/Timeout;-><clinit>()V

   certain eviction scenarios, leading to dropped response headers.

## Version 1.5.1

_2014-03-11_

 * Fix 1.5.0 regression where connections should not have been recycled.
 * Fix 1.5.0 regression where transparent Gzip was broken by attempting to
   recover from another I/O failure.
 * Fix problems where spdy/3.1 headers may not have been compressed properly.

import okhttp3.internal.toImmutableList

/**
 * Selects routes to connect to an origin server. Each connection requires a choice of proxy server,
 * IP address, and TLS mode. Connections may also be recycled.
 */
class RouteSelector(
  private val address: Address,
  private val routeDatabase: RouteDatabase,
  private val connectionUser: ConnectionUser,
  private val fastFallback: Boolean,
) {

    return connections.count {
      it.withLock { it.calls.isEmpty() }
    }
  }

  fun connectionCount(): Int {
    return connections.size
  }

  /**
   * Attempts to acquire a recycled connection to [address] for [connectionUser]. Returns the connection if it
   * was acquired, or null if no connection was acquired. The acquired connection will also be

2670..2671    ; valid                  ;      ; NV8    # 3.0  WEST SYRIAC CROSS..EAST SYRIAC CROSS
2672..267D    ; valid                  ;      ; NV8    # 3.2  UNIVERSAL RECYCLING SYMBOL..PARTIALLY-RECYCLED PAPER SYMBOL
267E..267F    ; valid                  ;      ; NV8    # 4.1  PERMANENT PAPER SIGN..WHEELCHAIR SYMBOL
2680..2689    ; valid                  ;      ; NV8    # 3.2  DIE FACE-1..BLACK CIRCLE WITH TWO WHITE DOTS