code: protected MessageFormat resolveCodeFromPlugins(String code, Locale locale) {
          if (pluginCacheMillis < 0) {
              PropertiesHolder propHolder = getMergedPluginProperties(locale);
              MessageFormat result = propHolder.getMessageFormat(code, locale);
              if (result != null) {
                  return result;
              }
          }
          else {
              MessageFormat result = findMessageFormatInBinaryPlugins(code, locale);
              if (result != null) return result;
          }
          return null;
      }
docs: Attempts to resolve a MessageFormat for the code from the list of plugin base names
  
  @param code The code
  @param locale The locale
  @return a MessageFormat