public @Nullable LookupEx showLookup(@NotNull Editor editor, LookupElement @NotNull [] items, @NotNull String prefix) {
    return showLookup(editor, items, prefix, new LookupArranger.DefaultArranger());
  }
public @Nullable LookupEx showLookup(@NotNull Editor editor, LookupElement @NotNull [] items, @NotNull String prefix)