# isSubsetOf method

bool isSubsetOf(

1. Set<Object?> other

)

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 subset of `other`, meaning all elements in this set also exist in `other`. If this set has more elements than `other`, it immediately returns `false` as an optimization.

Example:

    final a = {'x'};
    final b = {'x', 'y'};
    print(a.isSubsetOf(b)); // true

## Implementation

    bool isSubsetOf(Set<Object?> other) {
      if (length > other.length) return false;
      for (final element in this) {
        if (!other.contains(element)) return false;
      }
      return true;
    }