} else {
              request
            }

          this.newCall(actualRequest).enqueueEventSource(listener)
        }
    }
  }

  companion object {
    /**
     * Enqueues a [Call] and process it as [EventSource] with [listener].
     */
    @JvmStatic
    @JvmName("enqueue")
    fun Call.enqueueEventSource(listener: EventSourceListener): EventSource = RealEventSource(this, listener).also(this::enqueue)