This is "synchronous" work, you are "synchronized" with the cashier/cook 👨‍🍳. You have to wait 🕙 and be there at the exact moment that the cashier/cook 👨‍🍳 finishes the burgers and gives them to you, or otherwise, someone else might take them.

<img src="/img/async/parallel-burgers/parallel-burgers-04.png" class="illustration">

Но внутреннее устройство **конкурентности** и **параллелизма** довольно разное.

Чтобы это понять, представьте такую картину:

### Конкурентные бургеры

<!-- The gender neutral cook emoji "🧑‍🍳" does not render well in browsers. In the meantime, I'm using a mix of male "👨‍🍳" and female "👩‍🍳" cooks. -->

        }
        return OptionalEntity.empty();
    }

    protected OptionalEntity<CharMappingItem> createCharMappingItem(final CreateForm form, final VaErrorHook hook) {
        try {
            return createCharMappingItem(this, form, hook);
        } catch (final ValidationErrorException e) {
            saveToken();
            throw e;
        }
    }

        try {
            return createSynonymItem(this, form, hook);
        } catch (final ValidationErrorException e) {
            saveToken();
            throw e;
        }
    }

    public static OptionalEntity<SynonymItem> createSynonymItem(final FessBaseAction action, final CreateForm form,
            final VaErrorHook hook) {

        try {
            return createProtwordsItem(this, form, hook);
        } catch (final ValidationErrorException e) {
            saveToken();
            throw e;
        }
    }

    public static OptionalEntity<ProtwordsItem> createProtwordsItem(final FessBaseAction action, final CreateForm form,
            final VaErrorHook hook) {

    }

    public static OptionalEntity<StopwordsItem> createStopwordsItem(final CreateForm form, final VaErrorHook hook) {
        return getEntity(form).map(entity -> {
            final String newInput = form.input;
            validateStopwordsString(newInput, "input", hook);
            entity.setNewInput(newInput);
            return entity;
        });
    }

                  }
                }
              }));
    }

    @VisibleForTesting
    void addShutdownHook(Thread hook) {
      Runtime.getRuntime().addShutdownHook(hook);
    }
  }

  @J2ktIncompatible
  @GwtIncompatible // TODO
  private static void useDaemonThreadFactory(ThreadPoolExecutor executor) {
    executor.setThreadFactory(

        }
        return OptionalEntity.empty();
    }

    protected OptionalEntity<StemmerOverrideItem> createStemmerOverrideItem(final CreateForm form, final VaErrorHook hook) {
        try {
            return createStemmerOverrideItem(this, form, hook);
        } catch (final ValidationErrorException e) {
            saveToken();
            throw e;
        }
    }

        try {
            return createKuromojiItem(this, form, hook);
        } catch (final ValidationErrorException e) {
            saveToken();
            throw e;
        }
    }

    public static OptionalEntity<KuromojiItem> createKuromojiItem(final FessBaseAction action, final CreateForm form,
            final VaErrorHook hook) {

Because it is installed in the local project, you probably wouldn't be able to call that command directly, but you would put it on your `package.json` file.

It could look like this:

```JSON  hl_lines="7"
{
  "name": "frontend-app",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {