automatically retry on an unshared connection.
 *  Fix: Don't crash if a TLS tunnel's response body is truncated.
 *  Fix: Don't track unusable routes beyond their usefulness. We had a bug where we could track
    certain bad routes indefinitely; now we only track the ones that could be necessary.

      }
      return -1L
    }
  }

  companion object {
    private val ONLY_HTTP1 = listOf(Protocol.HTTP_1_1)

    /**
     * The maximum number of bytes to enqueue. Rather than enqueueing beyond this limit we tear down
     * the web socket! It's possible that we're writing faster than the peer can read.
     */
    private const val MAX_QUEUE_SIZE = 16L * 1024 * 1024 // 16 MiB.

    /**

    }

    limit = newLimit
    constructed = header.constructed
    if (name != null) path += name
    try {
      val result = block(header)

      // The object processed bytes beyond its range.
      if (newLimit != -1L && byteCount > newLimit) {
        throw ProtocolException("unexpected byte count at $this")
      }

      return result
    } finally {
      peekedHeader = null

    /** Maximum number of bytes to buffer before reporting a flow control error. */
    private val maxByteCount: Long,
    /**
     * True if either side has cleanly shut down this stream. We will receive no more bytes beyond
     * those already in the buffer.
     */
    internal var finished: Boolean,
  ) : Source {
    /** Buffer to receive data from the network into. Only accessed by the reader thread. */