class Mindee::Product::FR::EnergyBill::EnergyBillV1Document

def to_s
  energy_supplier = @energy_supplier.to_s
  energy_consumer = @energy_consumer.to_s
  subscription = subscription_to_s
  energy_usage = energy_usage_to_s
  taxes_and_contributions = taxes_and_contributions_to_s
  meter_details = @meter_details.to_s
  out_str = String.new
  out_str << "\n:Invoice Number: #{@invoice_number}".rstrip
  out_str << "\n:Contract ID: #{@contract_id}".rstrip
  out_str << "\n:Delivery Point: #{@delivery_point}".rstrip
  out_str << "\n:Invoice Date: #{@invoice_date}".rstrip
  out_str << "\n:Due Date: #{@due_date}".rstrip
  out_str << "\n:Total Before Taxes: #{@total_before_taxes}".rstrip
  out_str << "\n:Total Taxes: #{@total_taxes}".rstrip
  out_str << "\n:Total Amount: #{@total_amount}".rstrip
  out_str << "\n:Energy Supplier:"
  out_str << energy_supplier
  out_str << "\n:Energy Consumer:"
  out_str << energy_consumer
  out_str << "\n:Subscription:"
  out_str << subscription
  out_str << "\n:Energy Usage:"
  out_str << energy_usage
  out_str << "\n:Taxes and Contributions:"
  out_str << taxes_and_contributions
  out_str << "\n:Meter Details:"
  out_str << meter_details
  out_str[1..].to_s
end