removeFlag example

        return '6.4.6.0';
    }

    protected function defineFields(): FieldCollection
    {
        return new FieldCollection([
            (new IdField('id', 'id'))->addFlags(new PrimaryKey(), new Required()),
            (new StringField('name', 'name', 255))->addFlags(new Required()),
            (new StringField('event_name', 'eventName', 255))->addFlags(new Required()),
            new IntField('priority', 'priority'),
            (new BlobField('payload', 'payload'))->removeFlag(ApiAware::class)->addFlags(new WriteProtected(Context::SYSTEM_SCOPE)),
            (new BoolField('invalid', 'invalid'))->addFlags(new WriteProtected(Context::SYSTEM_SCOPE)),
            new BoolField('active', 'active'),
            new StringField('description', 'description', 500),
            (new OneToManyAssociationField('sequences', FlowSequenceDefinition::class, 'flow_id', 'id'))->addFlags(new CascadeDelete()),
            new CustomFields(),
            new FkField('app_flow_event_id', 'appFlowEventId', AppFlowEventDefinition::class),
            new ManyToOneAssociationField('appFlowEvent', 'app_flow_event_id', AppFlowEventDefinition::class, 'id', false),
        ]);
    }
}

return new FieldCollection([
            (new IdField('id', 'id'))->addFlags(new PrimaryKey(), new Required()),
            (new StringField('name', 'name'))->addFlags(new Required()),
            (new StringField('path', 'path'))->addFlags(new Required()),
            new StringField('author', 'author'),
            new StringField('copyright', 'copyright'),
            new StringField('license', 'license'),
            (new BoolField('active', 'active'))->addFlags(new Required()),
            (new BoolField('configurable', 'configurable'))->addFlags(new Required()),
            new StringField('privacy', 'privacy'),
            (new StringField('version', 'version'))->addFlags(new Required()),
            (new BlobField('icon', 'iconRaw'))->removeFlag(ApiAware::class),
            (new StringField('icon', 'icon'))->addFlags(new WriteProtected(), new Runtime()),
            (new StringField('app_secret', 'appSecret'))->removeFlag(ApiAware::class)->addFlags(new WriteProtected(Context::SYSTEM_SCOPE)),
            new ListField('modules', 'modules', JsonField::class),
            new JsonField('main_module', 'mainModule'),
            new ListField('cookies', 'cookies', JsonField::class),
            (new BoolField('allow_disable', 'allowDisable'))->addFlags(new Required()),
            new StringField('base_app_url', 'baseAppUrl', 1024),
            new ListField('allowed_hosts', 'allowedHosts', StringField::class),
            new IntField('template_load_priority', 'templateLoadPriority'),

            (new TranslationsAssociationField(AppTranslationDefinition::class, 'app_id'))->addFlags(new Required(), new CascadeDelete()),
            

protected function defineProtections(): EntityProtectionCollection
    {
        return new EntityProtectionCollection([new WriteProtection(Context::SYSTEM_SCOPE)]);
    }

    protected function defineFields(): FieldCollection
    {
        return new FieldCollection([
            (new IdField('id', 'id'))->addFlags(new PrimaryKey(), new Required()),
            (new FkField('locale_id', 'localeId', LocaleDefinition::class))->addFlags(new Required()),
            (new StringField('username', 'username'))->addFlags(new Required(), new SearchRanking(SearchRanking::HIGH_SEARCH_RANKING)),
            (new PasswordField('password', 'password', \PASSWORD_DEFAULT, [], PasswordField::FOR_ADMIN))->removeFlag(ApiAware::class)->addFlags(new Required()),
            (new StringField('first_name', 'firstName'))->addFlags(new Required(), new SearchRanking(SearchRanking::HIGH_SEARCH_RANKING)),
            (new StringField('last_name', 'lastName'))->addFlags(new Required(), new SearchRanking(SearchRanking::HIGH_SEARCH_RANKING)),
            (new StringField('title', 'title'))->addFlags(new SearchRanking(SearchRanking::MIDDLE_SEARCH_RANKING)),
            (new StringField('email', 'email'))->addFlags(new Required(), new SearchRanking(SearchRanking::HIGH_SEARCH_RANKING)),
            new BoolField('active', 'active'),
            new BoolField('admin', 'admin'),
            new DateTimeField('last_updated_password_at', 'lastUpdatedPasswordAt'),
            (new TimeZoneField('time_zone', 'timeZone'))->addFlags(new Required()),
            new CustomFields(),
            new ManyToOneAssociationField('locale', 'locale_id', LocaleDefinition::class, 'id', false),
            new FkField('avatar_id', 'avatarId', MediaDefinition::class),
            

        $kvPair = new KeyValuePair('date', $input[0], true);
        $encoded = $this->serializer->encode($this->field, $this->existence, $kvPair, $this->parameters)->current();
        $decoded = $this->serializer->decode($this->field, $encoded);

        static::assertEquals($input[1], $decoded, 'Output should be ' . print_r($input[1], true));
    }

    public function testSerializerValidatesRequiredField(): void
    {
        $kvPair = new KeyValuePair('date', null, true);
        $this->field->removeFlag(Required::class);

        $encoded = $this->serializer->encode($this->field, $this->existence, $kvPair, $this->parameters)->current();
        $decoded = $this->serializer->decode($this->field, $encoded);

        static::assertNull($decoded);

        $this->field->addFlags(new Required());
        static::expectException(WriteConstraintViolationException::class);
        $this->serializer->encode($this->field, $this->existence, $kvPair, $this->parameters)->current();
    }
}

new FkField('sales_channel_id', 'salesChannelId', SalesChannelDefinition::class))->addFlags(new ApiAware(), new Required()),
            (new FkField('language_id', 'languageId', LanguageDefinition::class))->addFlags(new ApiAware(), new Required()),
            (new FkField('last_payment_method_id', 'lastPaymentMethodId', PaymentMethodDefinition::class))->addFlags(new ApiAware()),
            (new FkField('default_billing_address_id', 'defaultBillingAddressId', CustomerAddressDefinition::class))->addFlags(new ApiAware(), new Required(), new NoConstraint()),
            (new FkField('default_shipping_address_id', 'defaultShippingAddressId', CustomerAddressDefinition::class))->addFlags(new ApiAware(), new Required(), new NoConstraint()),
            new AutoIncrementField(),
            (new NumberRangeField('customer_number', 'customerNumber', 255))->addFlags(new ApiAware(), new Required(), new SearchRanking(SearchRanking::HIGH_SEARCH_RANKING)),
            (new FkField('salutation_id', 'salutationId', SalutationDefinition::class))->addFlags(new ApiAware()),
            (new StringField('first_name', 'firstName'))->addFlags(new ApiAware(), new Required(), new SearchRanking(SearchRanking::MIDDLE_SEARCH_RANKING)),
            (new StringField('last_name', 'lastName'))->addFlags(new ApiAware(), new Required(), new SearchRanking(SearchRanking::HIGH_SEARCH_RANKING)),
            (new StringField('company', 'company'))->addFlags(new ApiAware(), new SearchRanking(SearchRanking::HIGH_SEARCH_RANKING)),
            (new PasswordField('password', 'password', \PASSWORD_DEFAULT, [], PasswordField::FOR_CUSTOMER))->removeFlag(ApiAware::class),
            (new EmailField('email', 'email'))->addFlags(new ApiAware(), new Required(), new SearchRanking(SearchRanking::MIDDLE_SEARCH_RANKING, false)),
            (new StringField('title', 'title'))->addFlags(new ApiAware()),
            (new ListField('vat_ids', 'vatIds', StringField::class))->addFlags(new ApiAware()),
            (new StringField('affiliate_code', 'affiliateCode'))->addFlags(new ApiAware()),
            (new StringField('campaign_code', 'campaignCode'))->addFlags(new ApiAware()),
            (new BoolField('active', 'active'))->addFlags(new ApiAware()),
            (new BoolField('double_opt_in_registration', 'doubleOptInRegistration'))->addFlags(new ApiAware()),
            (new DateTimeField('double_opt_in_email_sent_date', 'doubleOptInEmailSentDate'))->addFlags(new ApiAware()),
            (new DateTimeField('double_opt_in_confirm_date', 'doubleOptInConfirmDate'))->addFlags(new ApiAware()),
            (new StringField('hash', 'hash'))->addFlags(new ApiAware()),
            (new BoolField('guest', 'guest'))->addFlags(new ApiAware()),
            (

    protected function defineFields(): FieldCollection
    {
        return new FieldCollection([
            (new IdField('id', 'id'))->addFlags(new PrimaryKey(), new Required()),
            (new StringField('identifier', 'identifier'))->addFlags(new Required()),
            new TranslatedField('name'),
            (new BoolField('active', 'active'))->addFlags(new Required()),
            new StringField('group', 'group'),
            (new LongTextField('script', 'script'))->addFlags(new AllowHtml(false)),
            (new BlobField('constraints', 'constraints'))->removeFlag(ApiAware::class)->addFlags(new WriteProtected(Context::SYSTEM_SCOPE)),
            new JsonField('config', 'config'),
            (new FkField('app_id', 'appId', AppDefinition::class))->addFlags(new CascadeDelete(), new Required()),
            new ManyToOneAssociationField('app', 'app_id', AppDefinition::class),
            (new OneToManyAssociationField('ruleConditions', RuleConditionDefinition::class, 'script_id', 'id'))->addFlags(new SetNullOnDelete()),
            (new TranslationsAssociationField(AppScriptConditionTranslationDefinition::class, 'app_script_condition_id'))->addFlags(new Required()),
        ]);
    }
}

new JsonField('autoload', 'autoload'))->addFlags(new Required()),
            new BoolField('active', 'active'),
            new BoolField('managed_by_composer', 'managedByComposer'),
            new StringField('path', 'path'),
            new StringField('author', 'author'),
            new StringField('copyright', 'copyright'),
            new StringField('license', 'license'),
            (new StringField('version', 'version'))->addFlags(new Required()),
            new StringField('upgrade_version', 'upgradeVersion'),
            new DateTimeField('installed_at', 'installedAt'),
            new DateTimeField('upgraded_at', 'upgradedAt'),
            (new BlobField('icon', 'iconRaw'))->removeFlag(ApiAware::class),
            (new StringField('icon', 'icon'))->addFlags(new WriteProtected(), new Runtime()),
            new TranslatedField('label'),
            new TranslatedField('description'),
            new TranslatedField('manufacturerLink'),
            new TranslatedField('supportLink'),
            new TranslatedField('changelog'),
            new TranslatedField('customFields'),

            (new TranslationsAssociationField(PluginTranslationDefinition::class, 'plugin_id'))->addFlags(new Required(), new CascadeDelete()),
            (new OneToManyAssociationField('paymentMethods', PaymentMethodDefinition::class, 'plugin_id', 'id'))->addFlags(new SetNullOnDelete()),
        ]);
    }

$kvPair = new KeyValuePair('date', $in, true);
        $encoded = $this->serializer->encode($this->field, $this->existence, $kvPair, $this->parameters)->current();
        $decoded = $this->serializer->decode($this->field, $encoded);
        static::assertNotNull($decoded);

        static::assertEquals($expected, $decoded->format('c'), 'Output should be ' . $expected);
    }

    public function testSerializerValidatesRequiredField(): void
    {
        $kvPair = new KeyValuePair('date', null, true);
        $this->field->removeFlag(Required::class);

        $encoded = $this->serializer->encode($this->field, $this->existence, $kvPair, $this->parameters)->current();
        $decoded = $this->serializer->decode($this->field, $encoded);

        static::assertNull($decoded);

        $this->field->addFlags(new Required());
        static::expectException(WriteConstraintViolationException::class);
        $this->serializer->encode($this->field, $this->existence, $kvPair, $this->parameters)->current();
    }
}

        return '6.0.0.0';
    }

    protected function defineFields(): FieldCollection
    {
        return new FieldCollection([
            (new IdField('id', 'id'))->addFlags(new PrimaryKey(), new Required()),
            (new StringField('name', 'name'))->addFlags(new ApiAware(), new Required()),
            (new IntField('priority', 'priority'))->addFlags(new Required()),
            (new LongTextField('description', 'description'))->addFlags(new ApiAware()),
            (new BlobField('payload', 'payload'))->removeFlag(ApiAware::class)->addFlags(new WriteProtected(Context::SYSTEM_SCOPE)),
            (new BoolField('invalid', 'invalid'))->addFlags(new WriteProtected(Context::SYSTEM_SCOPE)),
            (new ListField('areas', 'areas'))->addFlags(new WriteProtected(Context::SYSTEM_SCOPE)),
            (new CustomFields())->addFlags(new ApiAware()),
            new JsonField('module_types', 'moduleTypes'),

            (new OneToManyAssociationField('conditions', RuleConditionDefinition::class, 'rule_id', 'id'))->addFlags(new CascadeDelete()),

            // Reverse Associations not available in sales-channel-api             (new OneToManyAssociationField('productPrices', ProductPriceDefinition::class, 'rule_id', 'id'))->addFlags(new RestrictDelete(), new RuleAreas(RuleAreas::PRODUCT_AREA)),
            (new OneToManyAssociationField('shippingMethodPrices', ShippingMethodPriceDefinition::class, 'rule_id', 'id'))->addFlags(new RestrictDelete(), new RuleAreas(RuleAreas::SHIPPING_AREA)),
            (new OneToManyAssociationField('shippingMethodPriceCalculations', ShippingMethodPriceDefinition::class, 'calculation_rule_id', 'id'))->addFlags(new RestrictDelete(), new RuleAreas(RuleAreas::SHIPPING_AREA)),
            (

protected function defineFields(): FieldCollection
    {
        $fields = new FieldCollection([
            (new IdField('id', 'id'))->addFlags(new ApiAware(), new PrimaryKey(), new Required()),
            new FkField('user_id', 'userId', UserDefinition::class),
            new FkField('media_folder_id', 'mediaFolderId', MediaFolderDefinition::class),
            (new StringField('mime_type', 'mimeType'))->addFlags(new ApiAware(), new WriteProtected(Context::SYSTEM_SCOPE), new SearchRanking(SearchRanking::LOW_SEARCH_RANKING)),
            (new StringField('file_extension', 'fileExtension'))->addFlags(new ApiAware(), new WriteProtected(Context::SYSTEM_SCOPE)),
            (new DateTimeField('uploaded_at', 'uploadedAt'))->addFlags(new ApiAware(), new WriteProtected(Context::SYSTEM_SCOPE)),
            (new LongTextField('file_name', 'fileName'))->addFlags(new ApiAware(), new WriteProtected(Context::SYSTEM_SCOPE), new SearchRanking(SearchRanking::HIGH_SEARCH_RANKING)),
            (new IntField('file_size', 'fileSize'))->addFlags(new ApiAware(), new WriteProtected(Context::SYSTEM_SCOPE)),
            (new BlobField('media_type', 'mediaTypeRaw'))->removeFlag(ApiAware::class)->addFlags(new WriteProtected(Context::SYSTEM_SCOPE)),
            (new JsonField('meta_data', 'metaData'))->addFlags(new ApiAware(), new WriteProtected(Context::SYSTEM_SCOPE)),
            (new JsonField('media_type', 'mediaType'))->addFlags(new WriteProtected(), new Runtime()),
            (new TranslatedField('alt'))->addFlags(new ApiAware(), new SearchRanking(SearchRanking::MIDDLE_SEARCH_RANKING)),
            (new TranslatedField('title'))->addFlags(new ApiAware(), new SearchRanking(SearchRanking::HIGH_SEARCH_RANKING)),
            (new StringField('url', 'url'))->addFlags(new ApiAware(), new Runtime()),
            (new BoolField('has_file', 'hasFile'))->addFlags(new ApiAware(), new Runtime()),
            (new BoolField('private', 'private'))->addFlags(new ApiAware()),
            (new TranslatedField('customFields'))->addFlags(new ApiAware()),
            (new BlobField('thumbnails_ro', 'thumbnailsRo'))->removeFlag(ApiAware::class)->addFlags(new Computed()),
            (new TranslationsAssociationField(MediaTranslationDefinition::class, 'media_id'))->addFlags(new ApiAware(), new Required()),
            (new ManyToManyAssociationField('tags', TagDefinition::class, MediaTagDefinition::class, 'media_id', 'tag_id'))->addFlags(new SearchRanking(SearchRanking::ASSOCIATION_SEARCH_RANKING)),
            (

new StringField('webhook_name', 'webhookName'))->addFlags(new Required()),
            (new StringField('event_name', 'eventName'))->addFlags(new Required()),
            (new StringField('delivery_status', 'deliveryStatus'))->addFlags(new Required()),
            new IntField('timestamp', 'timestamp'),
            new IntField('processing_time', 'processingTime'),
            new StringField('app_version', 'appVersion'),
            new JsonField('request_content', 'requestContent'),
            new JsonField('response_content', 'responseContent'),
            new IntField('response_status_code', 'responseStatusCode'),
            new StringField('response_reason_phrase', 'responseReasonPhrase'),
            (new StringField('url', 'url', 500))->addFlags(new Required()),
            (new BlobField('serialized_webhook_message', 'serializedWebhookMessage'))->removeFlag(ApiAware::class)->addFlags(new Required(), new WriteProtected(Context::SYSTEM_SCOPE)),
            new CustomFields(),
        ]);
    }
}

protected function defineFields(): FieldCollection
    {
        return new FieldCollection([
            (new IdField('id', 'id'))->addFlags(new PrimaryKey(), new Required()),
            new BoolField('create_thumbnails', 'createThumbnails'),
            new BoolField('keep_aspect_ratio', 'keepAspectRatio'),
            new IntField('thumbnail_quality', 'thumbnailQuality', 0, 100),
            new BoolField('private', 'private'),
            new BoolField('no_association', 'noAssociation'),
            new OneToManyAssociationField('mediaFolders', MediaFolderDefinition::class, 'media_folder_configuration_id', 'id'),
            new ManyToManyAssociationField('mediaThumbnailSizes', MediaThumbnailSizeDefinition::class, MediaFolderConfigurationMediaThumbnailSizeDefinition::class, 'media_folder_configuration_id', 'media_thumbnail_size_id'),
            (new BlobField('media_thumbnail_sizes_ro', 'mediaThumbnailSizesRo'))->removeFlag(ApiAware::class)->addFlags(new Computed()),
            new CustomFields(),
        ]);
    }
}

new OneToManyAssociationField('toMany', ExtendedDefinition::class, 'extendable_id'))
                ->addFlags(new ApiAware())
        );

        $collection->add(
            (new OneToOneAssociationField('toOne', 'id', 'extendable_id', ExtendedDefinition::class, false))
                ->addFlags(new ApiAware())
        );

        $collection->add(
            (new OneToOneAssociationField('toOneWithoutApiAware', 'id', 'extendable_id', ExtendedDefinition::class, false))
                ->removeFlag(ApiAware::class)
        );
    }

    public function getDefinitionClass(): string
    {
        return ExtendableDefinition::class;
    }
}