Type Definition melib::backends::notmuch::bindings::notmuch_config_list_key

type notmuch_config_list_key = unsafe extern "C" fn(config_list: *mut notmuch_config_list_t) -> *const c_char;

return key for current config pair

return value is owned by the iterator, and will be destroyed by the next call to notmuch_config_list_key or notmuch_config_list_destroy.

@since libnotmuch 4.4 (notmuch 0.23)