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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def create(self, items=[], taxes=[], custom_data=[]):
 """Adds the items to the invoice Format of 'items': [ InvoiceItem( name="VIP Ticket", quantity= 2, unit_price= "3500", total_price= "7000", description= "VIP Tickets for the Party" } ] """

        self.add_items(items)
        self.add_taxes(taxes)
        self.add_custom_data(custom_data)
        return self._process('checkout-invoice/create', self._prepare_data)