Add WebformPlugingSettingsTrait w/ Interface

Problem/Motivation

WebformHandler and WebformVariant plugins use configuration settings. Settings stored in a plugin's configuration require developers to call ::getConfiguration() and then get/set the plugins configuration settings.

The current approach to setting a plugins configuration settings.

$handler = $webform->getHandler('options_limit_default');
$configuration = $handler->getConfiguration();
$configuration['settings']['limit_source_entity'] = FALSE;
$handler->setConfiguration($configuration);
$webform->save();

Proposed resolution

Add WebformPlugingSettingsTrait w/ Interface

The new approach to setting a plugins configuration settings.

$webform->getHandler('options_limit_default')
  ->setSetting('limit_source_entity', FALSE);
$webform->save();

Remaining tasks

• Write patch
• Run tests
• Commit patch

User interface changes

N/A

API changes

New trait and plugin methods.

• \Drupal\webform\Plugin\WebformPlugingSettingsTrait
• \Drupal\webform\Plugin\WebformPlugingSettingsInterface

• :getSettings()
• :setSettings(array $settings)
• :getSetting($name)
• :setSetting($name, $value)

Data model changes

N/A