code: public static final String formatMessage(TraceComponent tc, String msgKey, Object... objs) {
          return formatMessage(tc, Locale.getDefault(), msgKey, objs);
      }
docs: Translate a message in the context of the input trace component using
  the default locale. This method is typically used to provide translated
  messages that might help resolve an exception that is surfaced to a user.
  
  @param tc
  the non-null <code>TraceComponent</code> of the message
  @param msgKey
  the message key identifying an NLS message for this event.
  This message must be in the resource bundle currently
  associated with the <code>TraceComponent</code>.
  @param objs
  a number of <code>Objects</code> to include as substitution
  text in the message. The number of objects passed must equal
  the number of substitution parameters the message expects.
  Null is tolerated.
  @return
  the translated message