SpaceVim/config/plugins/asyncomplete-buffer.vim

augroup asyncompelet_buffer
  autocmd!
  au User asyncomplete_setup call asyncomplete#register_source(asyncomplete#sources#buffer#get_source_options({
        \ 'name': 'B',
        \ 'whitelist': ['*'],
        \ 'blacklist': ['go'],
        \ 'completor': function('asyncomplete#sources#buffer#completor'),
        \ }))
augroup END