Rename to Emmet.vim!

autoload/emmet/lang.vim

@@ -0,0 +1,11 @@
+let s:exists = {}
+function! emmet#lang#exists(type)
+  if len(a:type) == 0
+    return 0
+  elseif has_key(s:exists, a:type)
+    return s:exists[a:type]
+  endif
+  let s:exists[a:type] = len(globpath(&rtp, 'autoload/emmet/lang/'.a:type.'.vim')) > 0
+  return s:exists[a:type]
+endfunction
+