Is 'config_list' iterator valid (i.e. _key, _value, _move_to_next can be called).
@since libnotmuch 4.4 (notmuch 0.23)
See Implementation
Is 'config_list' iterator valid (i.e. _key, _value, _move_to_next can be called).
@since libnotmuch 4.4 (notmuch 0.23)