code: protected static String parse(String key) {
          String value = (String) fetch(key);
          return parseFoundKey(value);
      }
docs: Resolve embedded key
  for example  - "#{name.first_name} #{name.last_name}" is a value for the the key name.name
  embedded in this value are 2 other keys that need to be resolved
  
  @param key that links to an embedded key
  @return fully resolved string