Group nodes and keep "them" together

[tommasobo]

Hello, I was wondering if it is possible to group nodes together and keep them inside a certain area.
I am talking about something like this:

For example here, Assembly A,B and C would never be able to "leave" the green area and so on. Is it doable with Vis?

[Vincent-CIRCL]

Feel free to take a look at my fork, this might meet your requirements : https://github.com/Vincent-CIRCL/visjs_classificator