code: public synchronized SibTr.Suppressor.Decision suppress(String msgkey, String formattedMessage)
    {
      return super.suppress(formattedMessage,formattedMessage);
    }
docs: Suppress this message if we have seen the message key and its inserts. We
  hash up the message key and the inserts so that we DON'T hold onto the
  object references of the inserts (and hence prevent their garbage
  collection).
  
  @see com.ibm.ws.sib.utils.ras.SibTr.Suppressor#suppress(java.lang.String, java.lang.String)
  @param msgkey The message key
  @param formattedMessage The formatted message resolved for language and inserts
  @return true if the message should be suppressor