message: Add sync::sync to internal prelude
diff: @@ -104,6 +104,7 @@ mod internal_prelude {
  export::*,
  handle::{get_id_type, is_valid_user_id, Handle},
  hl::plist::PropertyListClass,
  + sync::sync,
  util::{
  get_h5_str, string_from_cstr, string_from_fixed_bytes, string_to_fixed_bytes,
  to_cstring,
  