public virtual string locale(Pod pod, string key, string def, Locale locale)
{
object val;
Duration maxAge = Duration.m_maxVal;
// 1. 'props(pod, `locale/{locale}.props`)'
val = props(pod, locale.m_strProps, maxAge).get(key, null);
if (val != null) return (string)val;
// 2. 'props(pod, `locale/{lang}.props`)'
val = props(pod, locale.m_langProps, maxAge).get(key, null);
if (val != null) return (string)val;
// 3. 'props(pod, `locale/en.props`)'
val = props(pod, m_localeEnProps, maxAge).get(key, null);
if (val != null) return (string)val;
// 4. Fallback to 'pod::key' unless 'def' specified
if (def == m_noDef) return pod + "::" + key;
return def;
}