domain

type Account struct {
	ID    int
	Name  string
	Email string
	Info  Cyclic   // Info contains a cyclic field.
	Owner *Account // Owner is a cyclic field.
}

type Cyclic struct {
	UserID   int
	Username string
	Account  *Account
}

type CyclicInterface interface {
	CyclicFunc(CyclicInterface) bool
}