BoxRetentionPolicyAssignment assignment = new BoxRetentionPolicyAssignment(api, id);
assignment.delete();
client.retentionPolicies.deleteAssignment('12345')
.then(() => {
// deletion succeeded — no value returned
});
client.retentionPolicy.deleteAssignment(assignmentId: "123456") { result in
guard case let .success = result else {
print("Error deleting retention policy assignment")
return
}
print("Retention policy assignment was deleted")
}