@deftypefun {rl_command_func_t *} rl_function_of_keyseq (const char *keyseq, Keymap map, int *type)
@deftypefun {rl_command_func_t *} rl_function_of_keyseq_len (const char *keyseq, size_t len, Keymap map, int *type)
keyseq for them are raw (translated) key sequence. len is required for a key sequence that may include NULs.
@deftypefun int rl_bind_keyseq_if_unbound (const char *keyseq, rl_command_func_t *function)
@deftypefun int rl_bind_keyseq_if_unbound_in_map (const char *keyseq, rl_command_func_t *function, Keymap map)
@deftypefun int rl_macro_bind (const char *keyseq, const char *macro, Keymap map)
@deftypefun int rl_generic_bind (int type, const char *keyseq, char *data, Keymap map)
@deftypefun int rl_bind_keyseq (const char *keyseq, rl_command_func_t *function)
@deftypefun int rl_bind_keyseq_in_map (const char *keyseq, rl_command_func_t *function, Keymap map)
@deftypefun int rl_set_key (const char *keyseq, rl_command_func_t *function, Keymap map)
They call rl_translate_keyseq and accept both translated and untranslated form.
I also think there should be some description about this as the reporter of the patch wrote.