Style panel: missing ui_styles_ui_patterns plugin

Problem/Motivation

When using Display Builder with ui_styles module activated but without ui_styles_ui_patterns, i have a "plugin not found" fatal error.

This may be because of this method introduced by #3616791: Implement visual settings summary

  public function getSummary(): array {
    /** @var \Drupal\ui_patterns\SourceInterface $source */
    $source = $this->sourceManager->createInstance('ui_styles_attributes', [
      'settings' => ['styles' => $this->data],
    ]);

    return $source->settingsSummary();
  }

Proposed resolution

2 proposals:

• Replace ui_styles by ui_styles_ui_patterns in island attributes
• Wrap getSummary logic into a moduleHandler->moduleExists('ui_styles_ui_patterns()