): Relay {
      val randomAccessFile = RandomAccessFile(file, "rw")
      val result = Relay(randomAccessFile, upstream, 0L, metadata, bufferMaxSize)

      // Write a dirty header. That way if we crash we won't attempt to recover this.
      randomAccessFile.setLength(0L)
      result.writeHeader(PREFIX_DIRTY, -1L, -1L)

      return result
    }

    /**
     * Creates a relay that reads a recorded stream from [file].

   *
   * <p>The returned view supports all optional operations supported by this {@code RangeSet}, with
   * the caveat that an {@link IllegalArgumentException} is thrown on an attempt to {@linkplain
   * #add(Range) add} any range not {@linkplain Range#encloses(Range) enclosed} by {@code view}.
   */
  RangeSet<C> subRangeSet(Range<C> view);

  // Modification

  /**

			skip = act.Delete() && !act.DeleteRestored()
		}
	}

	fiv, err := obj.fileInfoVersions(o.Bucket)
	if err != nil {
		return
	}

	// Expire all versions if needed, if not attempt to queue for replication.
	for _, version := range fiv.Versions {
		objInfo := version.ToObjectInfo(o.Bucket, obj.name, versioned)

		if o.Lifecycle != nil {

  }

  fun idleConnectionCount(): Int =
    connections.count {
      it.withLock { it.calls.isEmpty() }
    }

  fun connectionCount(): Int = connections.size

  /**
   * Attempts to acquire a recycled connection to [address] for [connectionUser]. Returns the connection if it
   * was acquired, or null if no connection was acquired. The acquired connection will also be

    /**
     * Sets the maximum retry attempts for configuration synchronization status checks.
     *
     * @param maxConfigSyncStatusRetry the maximum retry attempts
     */
    public void setMaxConfigSyncStatusRetry(final int maxConfigSyncStatusRetry) {
        this.maxConfigSyncStatusRetry = maxConfigSyncStatusRetry;
    }

    /**
     * Sets the maximum retry attempts for search engine status checks.
     *

   * [closed][ResponseBody] and may be consumed only once.
   *
   * If this is a [cacheResponse], [networkResponse], or [priorResponse], the server's response body
   * is not available, and it is always an error to attempt read its streamed content. Reading from
   * [ResponseBody.source] always throws on such instances.
   *
   * It is safe and supported to call [ResponseBody.contentType] and [ResponseBody.contentLength] on

       * if the timer expires, otherwise behaves like {@link #get()}.
       */
      V get(long nanos)
          throws TimeoutException, CancellationException, ExecutionException, InterruptedException {

        // Attempt to acquire the shared lock with a timeout.
        if (!tryAcquireSharedNanos(-1, nanos)) {
          throw new TimeoutException("Timeout waiting for task.");
        }

        return getValue();
      }

			return nil, err
		}
		mac := hmac.New(sha256.New, key)
		mac.Write([]byte(baseKey))
		return sio.DecryptBuffer(nil, input, sio.Config{Key: mac.Sum(nil)})
	}
}

// decryptPartsChecksums will attempt to decrypt and decode part checksums, and save
// only the decrypted part checksum values on ObjectInfo directly.
// if part > 0, and we have the checksum for the part that will be returned.

func (b *block) toUSTAR() *headerUSTAR { return (*headerUSTAR)(b) }
func (b *block) toSparse() sparseArray { return sparseArray(b[:]) }

// getFormat checks that the block is a valid tar header based on the checksum.
// It then attempts to guess the specific format based on magic values.
// If the checksum fails, then FormatUnknown is returned.
func (b *block) getFormat() Format {
	// Verify checksum.
	var p parser

func (w *Walker) pushScope(name string) (popFunc func()) {
	w.scope = append(w.scope, name)
	return func() {
		if len(w.scope) == 0 {
			log.Fatalf("attempt to leave scope %q with empty scope list", name)
		}
		if w.scope[len(w.scope)-1] != name {
			log.Fatalf("attempt to leave scope %q, but scope is currently %#v", name, w.scope)
		}
		w.scope = w.scope[:len(w.scope)-1]
	}
}