def initialize_copy(original)
      super
      @source = @source.dup
      @source.each do |key, value|
        self[key] = value.clone if value.duplicable?
      end
    end
def initialize_copy(original)
      super
      @source = @source.dup
      @source.each do |key, value|
        self[key] = value.clone if value.duplicable?
      end
    end
Public