compresses messages of size 1 KiB and larger. (Inbound messages are compressed or not based on
    the web socket server's configuration.)
 *  New: Defer constructing `Inflater` and `Deflater` instances until they are needed. This saves
    memory if web socket compression is negotiated but not used.


## Version 4.5.0-RC1

_2020-03-17_

  @get:JvmName("dns")
  val dns: Dns = builder.dns

  @get:JvmName("proxy")
  val proxy: Proxy? = builder.proxy

  @get:JvmName("proxySelector")
  val proxySelector: ProxySelector =
    when {
      // Defer calls to ProxySelector.getDefault() because it can throw a SecurityException.
      builder.proxy != null -> NullProxySelector
      else -> builder.proxySelector ?: ProxySelector.getDefault() ?: NullProxySelector
    }

          continue
        }

        if (readBytesDelivered != -1L) {
          return readBytesDelivered
        }

        if (errorExceptionToDeliver != null) {
          // We defer throwing the exception until now so that we can refill the connection
          // flow-control window. This is necessary because we don't transmit window updates until