def to_csv_value(column)
      value = public_send(column)
      return if value.nil?
      return value.to_csv if value.respond_to?(:to_csv)

      value.to_s
    end
def to_csv_value(column)
      value = public_send(column)
      return if value.nil?
      return value.to_csv if value.respond_to?(:to_csv)

      value.to_s
    end
Returns the column in CSV format
 @param [Symbol] column name
 @return [String] column value as CSV string