SalesInvoiceAllowedActions

What can be done with a sales invoice right now. A hint for user interfaces that can be outdated with the next change; the action itself always checks again and refuses with the same codes. Actions: UPDATE_SALES_INVOICE, DELETE_SALES_INVOICE, UPDATE_SALES_INVOICE_LINE_ITEM, DELETE_SALES_INVOICE_LINE_ITEM, CREATE_SALES_INVOICE_SHIPPING_LINE_ITEM, FINALIZE_SALES_INVOICE, CANCEL_SALES_INVOICE.