unSetBy<T> method
Remove the valued link between 2 nodes but by Generic, but will not remove a and b and the link between them
Equivalent to unSet(a, b, T)
(Optional) Only if it matches any of anyTags and matches all items in allTags
Implementation
bool unSetBy<T>(a, b, {List anyTags = const [], List allTags = const []}) =>
unSet(a, b, T, anyTags: anyTags, allTags: allTags);