@Override public boolean covers(Instance datum){
  boolean isCover=true;
  for (int i=0; i < m_Antds.size(); i++) {
    Antd antd=m_Antds.get(i);
    if (!antd.covers(datum)) {
      isCover=false;
      break;
    }
  }
  return isCover;
}

@ Override public boolean covers ( Instance datum ) { boolean isCover = true ; for ( int i = 0 ; i < m_Antds . size ( ) ; i ++ ) { Antd antd = m_Antds . get ( i ) ; if ( ! antd . covers ( datum ) ) { isCover = false ; break ; } } return isCover ; }
whether the instance covered by this rule
