Folding from occurrence to next; two or more comments

Question

I wanted to fold my LaTeX document and found this:

https://tex.stackexchange.com/questions/130586/vim-nice-folding-function

(Which seems to indicate that folding has been removed from Latex-Box?) That takes care of environments. But I am still missing two functions, which I was hoping might be added to the code referred to, namely:

• folding from every occurrence of \somecommand to one line above the next;

• folding two or more subsequent commented out lines.