getThemeJsonConfig example

new EntitySearchResult(
                'theme',
                1,
                $themeCollection,
                null,
                new Criteria(),
                $this->context
            )
        );

        $storefrontPlugin = new StorefrontPluginConfiguration('Test');
        $storefrontPlugin->setThemeConfig(ThemeFixtures::getThemeJsonConfig());

        $this->storefrontPluginRegistryMock->method('getConfigurations')->willReturn(
            new StorefrontPluginConfigurationCollection(
                [
                    $storefrontPlugin,
                ]
            )
        );

        $config = $this->themeService->getThemeConfiguration($ids['themeId'], true, $this->context);