public function load($namespace, $group, $locale)
    {
        if ($this->isLoaded($namespace, $group, $locale)) {
            return;
        }

        // The loader is responsible for returning the array of language lines for the
        // given namespace, group, and locale. We'll set the lines in this array of
        // lines that have already been loaded so that we can easily access them.
        $lines = $this->loader->load($locale, $group, $namespace);

        $this->loaded[$namespace][$group][$locale] = $lines;
    }