Execute (Test cmdlinemenu api):
  let g:menu = SpaceVim#api#import('cmdlinemenu')
  let g:cmdlinemenu_rst = ''
  function! s:dark_mode() abort
      let g:cmdlinemenu_rst = 'dark mode'
  endfunction
  
  function! s:basic_mode() abort
      let g:cmdlinemenu_rst = 'basic mode'
  endfunction
  
  let g:ques = [
              \ ['dark powered mode', function('s:dark_mode')],
              \ ['basic mode', function('s:basic_mode')],
              \ ]