Is your feature request related to a problem? Please describe.
For functions that are long and have many nested statements, it is hard to see the scope where a line of code is being executed, since there are so many different scopes exiting and being entered into.

Describe the solution you'd like
It would be nice to have indentation markings, to know which level of scope you are in, just like here:

Furthermore, if we could 'fold' certain scopes so that the view is less cluttered, it will also be useful.