[Question] How to change layer options using init.vim
I'm trying to configure my spacevim using `init.vim` instead of `init.toml`. I was wondering tho how can I set the layers options tho.

For example I wanted to change the `shell` position to be at the bottom instead at the top. With a little bit of digging into the source code of SpaceVim I tried the following:

```vim
call SpaceVim#layers#shell#set_variable(['terminal', 'bottom', 30, 1])
```
The above function is located at `.SpaceVim/autoload/SpaceVim/layers/shell.vim` at the line `138`

That only resulted on opening the shell at the right side instead of the bottom.

Any ideas on how to change the my shell to open the way I intend it to and how can I set layer options on `init.vim` ?