checkOwnership method Null safety

OwnershipModel? checkOwnership(
  1. String address,
  2. String source,
  3. {String? origin}
)

Checks if an address has OwnershipModel over a source and origin.

Implementation

OwnershipModel? checkOwnership(String address, String source,
    {String? origin}) {
  throw UnimplementedError();
}