Пример #1
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 public double Accept(IPostageCalculator calculator)
 {
     return calculator.Visit(this);
 }
Пример #2
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 public double Accept(IPostageCalculator calculator)
 {
     return(calculator.Visit(this));
 }
Пример #3
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 public double Visit(Book book)
 {
     return(postageCalculator.Visit(book) * BOOK_POSTAGE_INCREASE_RATE);
 }