linkTos method
Get all links link from val
(Optional) Only if it matches any of anyTags
and matches all items in allTags
Implementation
Iterable linkTos(val, {List anyTags = const [], List allTags = const []}) {
final _v = _map_add_or_get(val, _newNode);
return anyTags.isEmpty && allTags.isEmpty
? _v.to.keys.map((n) => _node_to_val[n])
: _v.to.keys
.where((n) =>
_check_all_any_tags(_v, n, anyTags: anyTags, allTags: allTags))
.map((n) => _node_to_val[n]);
}