Re: New package `outline-occur'

>> Since 'outline-mode' and 'outline-minor-mode' use dedicated
>> keymaps, we need to bind a new key (the suggested key 'M-o'
>> is the most intuitive) under the existing prefix keys
>> 'outline-mode-prefix-map' and 'outline-minor-mode-prefix'.
>
> Besides the `outline-mode' and `outline-minor-mode' keymaps, I also
> thought on adding it to `search-map'.  Something like this:
>
>   (keymap-set search-map "M-o" #'outline-occur)
>
> So, you can do `M-s M-o' from any buffer---even if the Outline modes are
> not enabled.  What do you think?

Usually, it's expected that global keys should work in any buffer.
However, 'outline-occur' depends on the predefined 'outline-regexp'.