isSupersetOf method

Utility extension methods for working with sets in Dart.

Provides helpful methods for checking subset and superset relationships between sets, particularly when working with sets of nullable objects.

Example:

final a = {1, 2};
final b = {1, 2, 3};
print(a.isSubsetOf(b)); // true
print(b.isSupersetOf(a)); // true

Returns true if this set is a superset of other, meaning it contains all elements of other. Internally delegates to isSubsetOf.

Example:

final a = {1, 2, 3};
final b = {2};
print(a.isSupersetOf(b)); // true