Vitalize!

:lcd /path/to/plugin/
:Vitalize . Data.String Vim.BufferManager

dot means /path/to/plugin/
Test whether vital works

script under autoload
-----
let s:V = vital#of('{plugin-name}')
let s:List = s:V.import('{vital-module}')

Example: {plugin-name}  -> 'vim-helloworld'
         {vital-module} -> 'Data.List'