I broke up with neovim....vim is my best friend now

dot_vim/plugged/vim-lsp/autoload/lsp/utils/step.vim

@@ -0,0 +1,19 @@
+function! s:next(steps, current_index, result) abort
+    if len(a:steps) == a:current_index
+        return
+    endif
+    let l:Step = a:steps[a:current_index]
+    let l:ctx = {
+        \ 'callback': function('s:callback', [a:steps, a:current_index]),
+        \ 'result': a:result
+        \ }
+    call call(l:Step, [l:ctx])
+endfunction
+
+function! s:callback(steps, current_index, ...) abort
+    call s:next(a:steps, a:current_index + 1, a:000)
+endfunction
+
+function! lsp#utils#step#start(steps) abort
+    call s:next(a:steps, 0, [])
+endfunction