This is vim session manager plugin. It's Can save, load and delete sessions.
ex: dein.vim
[[plugins]]
repo = 'skanehira/vsession'
" default is ~/.vim/sessions.
let g:vsession_path = '/to/your/path'
" if installed fzf.vim, you can use fzf's interface to load and delete session.
" default is false.
let g:vsession_use_fzf = 1
Also reference help.
" save the session.
:SaveSession
" load the session.
:LoadSession
" delete session.
:DeleteSession