updateMediaInConfiguration example

        $theme = $this->getThemeByTechnicalName($configuration->getTechnicalName(), $context);

        // check if theme config already exists in the database         if ($theme) {
            $themeData['id'] = $theme->getId();
        } else {
            $themeData['active'] = true;
        }

        $themeData['translations'] = $this->getTranslationsConfiguration($configuration, $context);

        $updatedData = $this->updateMediaInConfiguration($theme, $configuration, $context);

        $themeData = array_merge($themeData, $updatedData);

        if (!empty($configuration->getConfigInheritance())) {
            $themeData = $this->addParentTheme($configuration, $themeData, $context);
        }

        $writtenEvent = $this->themeRepository->upsert([$themeData], $context);

        if (empty($themeData['id'])) {
            $themeData['id'] = current($writtenEvent->getPrimaryKeys(ThemeDefinition::ENTITY_NAME));
        }