Create New Invoice - Non Existing Client

In the manual it says the following…

When creating a invoice, start typing the name of the client to create the invoice for. If it’s an existing client, choose their name from the list that appears. If it’s a new client, type their full name or business name. Choose the date and invoice group and press the Submit button.

I couldn’t figure out how to Create Invoice from here by “type their full name or business name” without “Add Client” first.

Thanks for the info. This feature was removed due to changes in how clients are handled.

Was this feature in the old version of IP? I think this feature is good as it give 1 step process of creating new invoice for new client.

Where can I find the code for this feature?