private var writerTask: Task? = null

  /** Null until this web socket is connected. Only accessed by the reader thread. */
  private var reader: WebSocketReader? = null

  // All mutable web socket state is guarded by this.

  /** Null until this web socket is connected. Note that messages may be enqueued before that. */
  private var writer: WebSocketWriter? = null

///

### Flask 的 REST 框架 { #flask-rest-frameworks }

有幾個 Flask 的 REST 框架，但在投入時間調查後，我發現許多已停止維護或被棄置，且存在一些關鍵問題使之不適用。

### [Marshmallow](https://marshmallow.readthedocs.io/en/stable/) { #marshmallow }

API 系統需要的主要功能之一是資料「<dfn title="也稱為 marshalling、轉換">序列化</dfn>」，也就是把程式中的資料（Python）轉成能透過網路傳輸的形式。例如，將含有資料庫資料的物件轉成 JSON 物件、把 `datetime` 物件轉成字串等等。

 * {@snippet :
 * multimap.remove(key1, foo);
 * }
 *
 * <p>changes the entries iteration order to {@code [key2=bar, key1=baz]} and the key iteration
 * order to {@code [key2, key1]}. The {@link #entries()} iterator returns mutable map entries, and
 * {@link #replaceValues} attempts to preserve iteration order as much as possible.
 *
 * <p>The collections returned by {@link #keySet()} and {@link #asMap()} iterate through the keys in

            client.prepareClearScroll().addScrollId(scrollId).execute(ActionListener.wrap(() -> {}));
        }
    }

    @Override
    protected Number doReadNextVal() {
        final String msg = "This table is NOT related to sequence: " + asEsIndexType();
        throw new UnsupportedOperationException(msg);
    }

    @Override

import (
	. "bufio"
	"bytes"
	"errors"
	"io"
	"strings"
	"testing"
	"unicode"
	"unicode/utf8"
)

const smallMaxTokenSize = 256 // Much smaller for more efficient testing.

// Test white space table matches the Unicode definition.
func TestSpace(t *testing.T) {
	for r := rune(0); r <= utf8.MaxRune; r++ {
		if IsSpace(r) != unicode.IsSpace(r) {

	if err != nil {
		writeSTSErrorResponse(ctx, w, ErrSTSInternalError, err)
		return
	}

	// https://openid.net/specs/openid-connect-core-1_0.html#ClaimStability
	// claim is only considered stable when subject and iss are used together
	// this is to ensure that ParentUser doesn't change and we get to use
	// parentUser as per the requirements for service accounts for OpenID
	// based logins.
	var subFromToken string

          suite.addTest(new GeneratedMonitorTest(method, scenario, fair, null, expectedOutcome));
        }
      }
    }
  }

  /** A guard that encapsulates a simple, mutable boolean flag. */
  static class FlagGuard extends Monitor.Guard {

    private boolean satisfied;

    protected FlagGuard(Monitor monitor) {
      super(monitor);
    }

    @Override

        .thatReturn(Future.class)
        .testNulls();
  }

  // This test covers a bug where an Error thrown from a callback could cause the TimeoutFuture to
  // never complete when timing out.  Notably, nothing would get logged since the Error would get
  // stuck in the ScheduledFuture inside of TimeoutFuture and nothing ever calls get on it.

        .thatReturn(Future.class)
        .testNulls();
  }

  // This test covers a bug where an Error thrown from a callback could cause the TimeoutFuture to
  // never complete when timing out.  Notably, nothing would get logged since the Error would get
  // stuck in the ScheduledFuture inside of TimeoutFuture and nothing ever calls get on it.

		mysqlArgs := target.MySQLArgs{
			Enable:             enabled,
			Format:             env.Get(formatEnv, kv.Get(target.MySQLFormat)),
			DSN:                env.Get(dsnStringEnv, kv.Get(target.MySQLDSNString)),
			Table:              env.Get(tableEnv, kv.Get(target.MySQLTable)),
			QueueDir:           env.Get(queueDirEnv, kv.Get(target.MySQLQueueDir)),
			QueueLimit:         queueLimit,
			MaxOpenConnections: maxOpenConnections,
		}