diff --git a/autoload/lsp/omni.vim b/autoload/lsp/omni.vim
index 70764cc4d..595450c2a 100644
--- a/autoload/lsp/omni.vim
+++ b/autoload/lsp/omni.vim
@@ -300,7 +300,7 @@ endfunction
 "
 " This function should call at `CompleteDone` only if not empty `v:completed_item`.
 "
-function! lsp#omni#clear_managed_user_data_map() abort
+function! lsp#omni#_clear_managed_user_data_map() abort
     let s:managed_user_data_key_base = 0
     let s:managed_user_data_map = {}
 endfunction
@@ -309,10 +309,11 @@ endfunction
 " create item's user_data.
 "
 function! s:create_user_data(completion_item, server_name) abort
-    let l:user_data_key = 'vim-lsp/' . string(s:managed_user_data_key_base)
-    let s:managed_user_data_map[l:user_data_key] = {}
-    let s:managed_user_data_map[l:user_data_key]['server_name'] = a:server_name
-    let s:managed_user_data_map[l:user_data_key]['completion_item'] = a:completion_item
+    let l:user_data_key = 'vim-lsp/key/' . string(s:managed_user_data_key_base)
+    let s:managed_user_data_map[l:user_data_key] = {
+                \   'server_name': a:server_name,
+                \   'completion_item': a:completion_item
+                \ }
     let s:managed_user_data_key_base += 1
     return l:user_data_key
 endfunction
diff --git a/autoload/lsp/ui/vim/completion.vim b/autoload/lsp/ui/vim/completion.vim
index 258e0c2c4..d6561c56d 100644
--- a/autoload/lsp/ui/vim/completion.vim
+++ b/autoload/lsp/ui/vim/completion.vim
@@ -32,7 +32,7 @@ function! s:on_complete_done() abort
   let l:managed_user_data = lsp#omni#get_managed_user_data_from_completed_item(v:completed_item)
 
   " Clear managed user_data.
-  call lsp#omni#clear_managed_user_data_map()
+  call lsp#omni#_clear_managed_user_data_map()
 
   " If managed user_data does not exists, skip it.
   if empty(l:managed_user_data)
@@ -81,9 +81,10 @@ function! s:on_complete_done_after() abort
           \   l:completed_item,
           \   l:completion_item
           \ )
+
     if exists('g:lsp_snippets_expand_snippet') && len(g:lsp_snippets_expand_snippet) > 0
       " vim-lsp-snippets expects commit characters removed.
-      call s:expand_text_simply(v:completed_item['word'])
+      call s:simple_expand_text(v:completed_item['word'])
     elseif exists('g:lsp_snippet_expand') && len(g:lsp_snippet_expand) > 0
       " other snippet integartion point.
       call g:lsp_snippet_expand[0]({
@@ -91,7 +92,7 @@ function! s:on_complete_done_after() abort
             \ })
     else
       " expand text simply.
-      call s:expand_text_simply(l:expand_text)
+      call s:simple_expand_text(l:expand_text)
     endif
   endif
 
@@ -196,10 +197,7 @@ function! s:clear_inserted_text(line, position, completed_item, completion_item)
         \ }])
 
   " Move to complete start position.
-  call cursor(
-        \   l:range['start']['line'] + 1,
-        \   lsp#utils#to_col('%', l:range['start']['line'] + 1, l:range['start']['character'])
-        \ )
+  call cursor(lsp#utils#position#_lsp_to_vim('%', l:range['start']))
 endfunction
 
 "
@@ -218,7 +216,7 @@ endfunction
 "
 " Expand text
 "
-function! s:expand_text_simply(text) abort
+function! s:simple_expand_text(text) abort
   let l:pos = {
         \   'line': line('.') - 1,
         \   'character': lsp#utils#to_char('%', line('.'), col('.'))
@@ -239,10 +237,12 @@ function! s:expand_text_simply(text) abort
         \   },
         \   'newText': l:text
         \ }])
-  call cursor(
-        \   l:pos['line'] + 1,
-        \   lsp#utils#to_col('%', l:pos['line'] + 1, l:pos['character']) + l:offset
-        \ )
+
+  let l:pos = lsp#utils#position#_lsp_to_vim('%', {
+        \   'line': l:pos['line'],
+        \   'character': l:pos['character'] + l:offset
+        \ })
+  call cursor(l:pos)
 endfunction
 
 "
diff --git a/test/lsp/omni.vimspec b/test/lsp/omni.vimspec
index 8e62321c5..fd16a5c62 100644
--- a/test/lsp/omni.vimspec
+++ b/test/lsp/omni.vimspec
@@ -1,7 +1,7 @@
 Describe lsp#omni
 
     Before each
-        call lsp#omni#clear_managed_user_data_map()
+        call lsp#omni#_clear_managed_user_data_map()
     End
 
     Describe lsp#omni#get_vim_completion_item
@@ -22,7 +22,7 @@ Describe lsp#omni
             \ 'empty': 1,
             \ 'kind': 'function',
             \ 'menu': 'my-detail',
-            \ 'user_data': 'vim-lsp/0'
+            \ 'user_data': 'vim-lsp/key/0'
             \}
 
             Assert Equals(lsp#omni#get_vim_completion_item(item), want)
@@ -56,7 +56,7 @@ Describe lsp#omni
             \ 'empty': 1,
             \ 'kind': 'function',
             \ 'menu': 'my-detail',
-            \ 'user_data': 'vim-lsp/0'
+            \ 'user_data': 'vim-lsp/key/0'
             \}
 
             let got = lsp#omni#get_vim_completion_item(item)
@@ -84,7 +84,7 @@ Describe lsp#omni
             \ 'empty': 1,
             \ 'kind': 'function',
             \ 'menu': 'my-detail more-detail',
-            \ 'user_data': 'vim-lsp/0'
+            \ 'user_data': 'vim-lsp/key/0'
             \}
 
             Assert Equals(lsp#omni#get_vim_completion_item(item), want)