[
  (block_block)
  (block_if)
  (block_if_else)
  (block_if_then)
  (block_loop)
  (block_try_table)
  (module)
  (module_field_data)
  (module_field_elem)
  (module_field_export)
  (module_field_func)
  (module_field_global)
  (module_field_import)
  (module_field_memory)
  (module_field_start)
  (module_field_table)
  (module_field_tag)
  (rec_type)
  (type_def)
] @fold