Rubymine all auto-complete in code editor

The original question is raised here and sugested solutions there does not work!

https://intellij-support.jetbrains.com/hc/en-us/community/posts/206061279-Does-Rubymine-have-the-feature-code-snippet-and-all-auto-complete?input_string=Rubymine%20all%20auto-complete%20in%20code%20editor

How to make code editor behave like 'all autocomplete' plugin for ST3?

If i typed somewhere "rubymine" next time i type "r" it will suggest me "rubymine" in autocomplete dropdown

I can't believe there is no such feature in Rubymine

My settings are default and no hotkeys described there help, is there such feature in rubymine at all?

Thanks.