Function get_option_value 

pub fn get_option_value<Opt>(
    name: &str,
    opts: &OptionValueOpts,
) -> Result<Opt, Error>
where
    Opt: FromObject,

Binding to nvim_get_option_value.

Gets the local value of an option if it exists, or the global value otherwise. Local values always correspond to the current buffer or window.

To get a buffer-local orr window-local option for a specific buffer of window consider using Buffer::get_option or Window::get_option instead.