Add step to configurable quick form documentation that describes setting #default_value.
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@ -244,9 +244,11 @@ To make an existing quick form configurable:
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assigns configuration to `$this->configuration`.
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6. Add a `config/schema/[mymodule].schema.yml` file that describes the
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[configuration schema/metatdata](https://www.drupal.org/docs/drupal-apis/configuration-api/configuration-schemametadata).
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7. Add `'#default_value' => $this->configuration['...']` lines to the form
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elements that are configurable in the `buildForm()` method.
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The following is the same "Harvest" example as above, with the new interface
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and methods, followed by the schema file that describes the settings.
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The following is the same "Harvest" example as above, with the changes described
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above, followed by the schema file that describes the settings.
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```php
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<?php
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