How to Set - Send lockout email to user

In Okta, authentication screen, password settings. One option is to “Send lockout email to user”
I’m trying to set this up through Okta SDK.
I have the PasswordPolicyBuilder and have everything else set up (password min and max length). BUT the one item I can not find is “Send lockout email to user”. Is this somewhere else? It seems like this would be straight forward Boolean like other values.
Please help.