@Override
  public double getDoubleValue(int i, double v) {
    return (Double) (isAttributeExist(i) ? elements.get(i) : v);
  }
@ Override public double getDoubleValue ( int i , double v ) { return ( Double ) ( isAttributeExist ( i ) ? elements . get ( i ) : v ) ; }
@see org.jdiameter.api.Configuration class