def to_s(format = 'dd/mm/yyyy')
      SUPPORTED_FIELDS.collect do |k,v|
        next unless current = instance_variable_get("@#{k}")
        field = v.keys.first
        case current.class.to_s
        when "Time", "Date", "DateTime"
          "#{field}#{DateFormat.new(format).format(current)}"
        when "Float"
          "#{field}#{'%.2f'%current}"
        when "String"
          current.split("\n").collect {|x| "#{field}#{x}" }
        else
          "#{field}#{current}"
        end
      end.concat(@splits.collect{|s| s.to_s}).flatten.compact.join("\n")
    end
def to_s(format = 'dd/mm/yyyy')
      SUPPORTED_FIELDS.collect do |k,v|
        next unless current = instance_variable_get("@#{k}")
        field = v.keys.first
        case current.class.to_s
        when "Time", "Date", "DateTime"
          "#{field}#{DateFormat.new(format).format(current)}"
        when "Float"
          "#{field}#{'%.2f'%current}"
        when "String"
          current.split("\n").collect {|x| "#{field}#{x}" }
        else
          "#{field}#{current}"
        end
      end.concat(@splits.collect{|s| s.to_s}).flatten.compact.join("\n")
    end
Returns a representation of the transaction as it
 would appear in a qif file.