Vsch\TranslationManager\Manager::cacheUsageInfo PHP Method

    public function cacheUsageInfo($key, $value, $locale)
    {
        list($group, $transKey) = self::groupKeyList($key);
        if ($group) {
            if (!array_key_exists($group, $this->usageCache())) {
                $this->usageCache[$group] = [];
            }
            $this->usageCache[$group][$this->usageCacheKey($transKey, $locale)] = $value;
            $this->usageCacheIsDirty = $this->persistentPrefix !== '';
        }
    }