MP_DECLARE_CONST_FUN_OBJ(mp_stream_read_obj);
MP_DECLARE_CONST_FUN_OBJ(mp_stream_readall_obj);
MP_DECLARE_CONST_FUN_OBJ(mp_stream_unbuffered_readline_obj);
MP_DECLARE_CONST_FUN_OBJ(mp_stream_unbuffered_readlines_obj);
MP_DECLARE_CONST_FUN_OBJ(mp_stream_write_obj);

// Iterator which uses mp_stream_unbuffered_readline_obj
mp_obj_t mp_stream_unbuffered_iter(mp_obj_t self);