issue Invoice
Issues a draft invoice, making it visible to the customer.
Return
A pair containing the issued Invoice on success, or a NetworkingError on failure.
Parameters
invoice Id
The unique identifier of the invoice to issue.
Issues a draft invoice and delivers the result via a callback.
Parameters
invoice Id
The unique identifier of the invoice to issue.
completion Handler
Invoked on completion with the issued Invoice on success, or a NetworkingError on failure.