class Stripe::FundingInstructions

Related guide: [Customer balance funding instructions](stripe.com/docs/payments/customer-balance/funding-instructions)
‘financial_addresses` field.
Customers can fund this balance by initiating a bank transfer to any account in the
automatically applied to future invoices and payments using the `customer_balance` payment method.
Each customer has a [`balance`](stripe.com/docs/api/customers/object#customer_object-balance) that is

def resource_url 

def resource_url
  if !respond_to?(:customer) || customer.nil?
    raise NotImplementedError,
          "FundingInstructions cannot be accessed without a customer ID."
  end
  "#{Customer.resource_url}/#{CGI.escape(customer)}/funding_instructions" "/#{CGI.escape(id)}"
end