sneaky-part1-7.java

public interface Customer {
    ...
    List<Order> getOrders();
}

try {
    List<Customer> customers = queryDatabaseForCustomers(); // Expected to throw SQLException
    handleAllOrdersOf(customers); // Not expected to throw SQLException
} catch (SQLException e) {
    // Handle the exception from queryDatabaseForCustomers()
}

private void handleAllOrdersOf(List<Customer> customers) { // No throws clause here
    Optional.ofNullable(customers)
        .orElseGet(Collections::emptyList).stream()
        .map(Customer::getOrders) // List of orders already populated
        .forEach(this::processOrder);
}