extends AbstractContainerTester<Collection<E>, E> {

  // TODO: replace this with an accessor.
  protected Collection<E> collection;

  @Override
  protected Collection<E> actualContents() {
    return collection;
  }

  // TODO: dispose of this once collection is encapsulated.
  @Override
  @CanIgnoreReturnValue
  protected Collection<E> resetContainer(Collection<E> newContents) {
    collection = super.resetContainer(newContents);

    extends AbstractContainerTester<Collection<E>, E> {

  // TODO: replace this with an accessor.
  protected Collection<E> collection;

  @Override
  protected Collection<E> actualContents() {
    return collection;
  }

  // TODO: dispose of this once collection is encapsulated.
  @Override
  @CanIgnoreReturnValue
  protected Collection<E> resetContainer(Collection<E> newContents) {
    collection = super.resetContainer(newContents);

        return facadeSelectByPK(id);
    }

    protected OptionalEntity<WebConfig> facadeSelectByPK(String id) {
        return doSelectOptionalByPK(id, typeOfSelectedEntity());
    }

    protected <ENTITY extends WebConfig> ENTITY doSelectByPK(String id, Class<? extends ENTITY> tp) {
        return doSelectEntity(xprepareCBAsPK(id), tp);
    }

    protected WebConfigCB xprepareCBAsPK(String id) {

                }
              });
        }

        @Override
        protected void doStop() {
          triggerShutdown();
        }

        @Override
        public String toString() {
          return AbstractExecutionThreadService.this.toString();
        }
      };

  /** Constructor for use by subclasses. */
  protected AbstractExecutionThreadService() {}

  /**

    //                                                                           =========
    /** createdAt */
    protected LocalDateTime createdAt;

    /** updatedAt */
    protected LocalDateTime updatedAt;

    // [Referrers] *comment only

    // ===================================================================================

    //                                                                           =========
    /** elevateWordId */
    protected String elevateWordId;

    /** labelTypeId */
    protected String labelTypeId;

    // [Referrers] *comment only

    // ===================================================================================
    //                                                                             DB Meta

   * that callers don't pass an {@link Entry} by mistake.
   */
  protected V get(K key) {
    return getMap().get(key);
  }

  protected final K k0() {
    return e0().getKey();
  }

  protected final V v0() {
    return e0().getValue();
  }

  protected final K k1() {
    return e1().getKey();
  }

  protected final V v1() {
    return e1().getValue();
  }

    //                                                                          ==========
    protected final String _tableDbName = "role";
    protected final String _tableDispName = "role";
    protected final String _tablePropertyName = "Role";

    public String getTableDbName() {
        return _tableDbName;
    }

    @Override

    /**
     * The script type.
     */
    protected static final String SCRIPT_TYPE = "script_type";

    /**
     * The mime type.
     */
    public String mimeType = "application/datastore";

    /**
     * The flag to check if the data store is alive.
     */
    protected boolean alive = true;

    /**
     * Register this data store.
     */

        new AbstractService() {
          @Override
          protected void doStart() {
            // Never starts!
          }

          @Override
          protected void doCancelStart() {
            assertThat(state()).isEqualTo(Service.State.STOPPING);
            notifyStopped();
          }

          @Override
          protected void doStop() {