public boolean hasDiphone(String diphone){
  return !(missingDiphones != null && missingDiphones.contains(diphone));
}

public boolean hasDiphone ( String diphone ) { return ! ( missingDiphones != null && missingDiphones . contains ( diphone ) ) ; }
verify whether a diphone ( p1 - p2 ) is in the list of missing diphones .
