Oh, I meant to emphasis on that "customerService depends on accountService and vice versa" thingy. While in my writings "accountService is a member of customer" is a form of customer depending on accountService.

But my main point is that it should not be written that way at all.

Semantically, if we must include the subject, it should be

`theService.createAccount(Customer, NewAccountData)`

Or replace theService with CustomerAccountService or whatever.

Writing that way, with functions depending on types, avoid getting tangled from the so-called account-customer cyclical dependencies. Because account and customer don't need to know each other until a function needs to know both of them. There's no such thing as `customer.getAccounts()` because in the end the query would roughly look like `getAccountsWhereCustomerIs(CustomerId)`.

You're not dumb. It's just me mis-writing due to the fact that I'm writing this at 4 in the morning lol. Or maybe I'm misinterpreted parent comment and that confuses you. In that case, I'm the dumb.