def append(self, parent, child):

        return self.insert(parent, len(parent.children), child)
Returns a Decimal of the amount to be charged.
dataset/ETHPy150Open enthought/pyface/pyface/viewer/default_tree_content_provider.py/DefaultTreeContentProvider.append--crossover with--dataset/ETHPy150Open dimagi/commcare-hq/corehq/apps/accounting/payment_handlers.py/InvoiceStripePaymentHandler.get_charge_amount