Creates one batch transfer in a single request. The batch may contain
multiple transfer orders of different types.

• Only one batch can be imported per request.
• A batch may contain up to 1000 transfer orders.
• The common debit account is passed at the top level in debitAccount.
• Individual orders are passed in the transferOrders array.

Validation rules

• debitAccount and transferOrders are required.
• transferOrders must not be empty.
• Maximum 1000 orders per batch.
• If position is provided for one order, it must be provided for all orders.
• Debit/credit accountNumber must be in a valid format.
• accountCurrencyCode must be a valid ISO currency code.
• Fields and currency restrictions are validated per transfer type rules
  (same as for single transfers).