Couldn't we make `customer#bank_accounts` lazy loaded? [Inside](https://github.com/neighborly/neighborly-balanced/blob/2ebab2c70b7a4a750082d14377f61088a90caa2a/app/models/neighborly/balanced/customer.rb) `Neighborly::Balanced::Customer` may exist a `#bank_accounts` method:

```ruby
module Neighborly::Balanced
  class Customer
    def bank_accounts
      @bank_accounts ||= customer.bank_accounts
    end
  end
end
```

Then, here in the controller, we would just call `customer.bank_accounts` and remove this `#customer_bank_accounts` method definition.