if (headerList == null) {
            headerList = new ArrayList<>();
        }
        headerList.add(new String[] { key, value });
        return this;
    }

    /**
     * Connects to the URL and executes the request.
     *
     * @param actionListener the action listener for handling the response
     * @param exceptionListener the exception listener for handling exceptions
     */

   *
   * This test yields threads to force the decision of plan1 to be deliberate and not lucky. In
   * particular, we set up this sequence of events:
   *
   *  1. take plan 0
   *  3. plan 0 connects
   *  4. finish taking plan 1
   *
   * https://github.com/square/okhttp/issues/7152
   */
  @Test
  fun reusePlanAndNewConnectRace() {
    val plan0 = routePlanner.addPlan()

    calls that use a pooled connection.


## Version 4.3.1

_2020-01-07_

 *  Fix: Don't crash with a `NullPointerException` when a web socket is closed before it connects.
    This regression was introduced in OkHttp 4.3.0.
 *  Fix: Don't crash with an `IllegalArgumentException` when using custom trust managers on

## Réplication - Nombre de processus { #replication-number-of-processes }

			if newState == StateConnected {
				return nil
			}
		}
	}
}

/*
var ErrDone = errors.New("done for now")

var ErrRemoteRestart = errors.New("remote restarted")


// Stateless connects to the remote handler and return all packets sent back.
// If the remote is restarted will return ErrRemoteRestart.
// If nil will be returned remote call sent EOF or ErrDone is returned by the callback.

      }

    /**
     * Configure this client to perform fast fallbacks by attempting multiple connections
     * concurrently, returning once any connection connects successfully.
     *
     * This implements Happy Eyeballs ([RFC 6555][rfc_6555]), balancing connect latency vs.
     * wasted resources.
     *

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

  /**
   * Make a request with two routes. The first route will time out because it's connecting to a
   * special address that never connects. The automatic retry will succeed.
   */
  @Test
  fun connectTimeoutsAttemptsAlternateRoute() {
    val proxySelector = RecordingProxySelector()

    assertTrue(future1.wasInterrupted());
  }

  /**
   * Test the case where the futures are fulfilled prior to constructing the ListFuture. There was a
   * bug where the loop that connects a Listener to each of the futures would die on the last
   * loop-check as done() on ListFuture nulled out the variable being looped over (the list of
   * futures).
   */

    assertTrue(future1.wasInterrupted());
  }

  /**
   * Test the case where the futures are fulfilled prior to constructing the ListFuture. There was a
   * bug where the loop that connects a Listener to each of the futures would die on the last
   * loop-check as done() on ListFuture nulled out the variable being looped over (the list of
   * futures).
   */

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