It’s using 
Lovelace_gen - Add abilities to ui_lovelace.yaml. The include is referencing the code in titles.yaml that I have also posted.
Take a look at the Lovelace Gen documentation: Passing arguments to included files
It’s using Lovelace_gen - Add abilities to ui_lovelace.yaml. The include is referencing the code in titles.yaml that I have also posted.
Take a look at the Lovelace Gen documentation: Passing arguments to included files