* network interceptors return.
   */
  internal var interceptorScopedExchange: Exchange? = null
    private set

  // These properties are guarded by [lock]. They are typically only accessed by the thread executing
  // the call, but they may be accessed by other threads for duplex requests.

  /** True if this call still has a request body open. */
  private var requestBodyOpen = false

import okio.BufferedSink
import okio.BufferedSource

/**
 * A connection to a remote web server capable of carrying 1 or more concurrent streams.
 *
 * Connections are shared in a connection pool. Accesses to the connection's state must be guarded
 * by holding a lock on the connection.
 */
class RealConnection(
  val taskRunner: TaskRunner,
  val connectionPool: RealConnectionPool,
  override val route: Route,

    val queue: TaskQueue,
    var policy: ConnectionPool.AddressPolicy,
  ) {
    /**
     * How many calls the pool can carry without opening new connections. This field must only be
     * accessed by the connection closer task.
     */
    var concurrentCallCapacity: Int = 0
  }

  companion object {
    fun get(connectionPool: ConnectionPool): RealConnectionPool = connectionPool.delegate

     * those already in the buffer.
     */
    internal var finished: Boolean,
  ) : Source {
    /** Buffer to receive data from the network into. Only accessed by the reader thread. */
    val receiveBuffer = Buffer()

    /** Buffer with readable data. Guarded by Http2Stream.this. */
    val readBuffer = Buffer()

    /**