return os.getArch() != null || os.getFamily() != null || os.getName() != null || os.getVersion() != null;
    }

    private boolean determineVersionMatch(String version) {
        String test = version;
        boolean reverse = false;

        if (test.startsWith("!")) {
            reverse = true;
            test = test.substring(1);
        }

	}

	var names []string
	DB.Table("users").Where("name like ?", "distinct%").Order("name").Pluck("name", &names)
	AssertEqual(t, names, []string{"distinct", "distinct", "distinct", "distinct-2", "distinct-3"})

	var names1 []string
	DB.Model(&User{}).Where("name like ?", "distinct%").Distinct().Order("name").Pluck("Name", &names1)

	AssertEqual(t, names1, []string{"distinct", "distinct-2", "distinct-3"})

final class TestUtil {
  static final String ERROR_ELEMENT_NOT_IN_GRAPH = "not an element of this graph";
  static final String ERROR_NODE_NOT_IN_GRAPH =
      "Should not be allowed to pass a node that is not an element of the graph.";
  static final String ERROR_ELEMENT_REMOVED = "used to generate this set";
  private static final String NODE_STRING = "Node";
  private static final String EDGE_STRING = "Edge";

  enum EdgeType {

        this.out = out;
    }

    @Override
    public void transferInitiated(TransferEvent event) {
        String action = event.getRequestType() == TransferEvent.RequestType.PUT ? "Uploading" : "Downloading";
        String direction = event.getRequestType() == TransferEvent.RequestType.PUT ? "to" : "from";

        TransferResource resource = event.getResource();

    private final InternalMavenSession session;

    private final Map<String, Path> paths = new ConcurrentHashMap<>();

    @Inject
    public DefaultArtifactManager(@Nonnull InternalMavenSession session) {
        this.session = session;
    }

    @Nonnull
    @Override
    public Optional<Path> getPath(@Nonnull Artifact artifact) {
        String id = id(nonNull(artifact, "artifact"));

                            "items": {
                                "anyOf": [{"type": "string"}, {"type": "integer"}]
                            },
                        },
                        "msg": {"title": "Message", "type": "string"},
                        "type": {"title": "Error Type", "type": "string"},
                    },
                },
                "HTTPValidationError": {

                            "items": {
                                "anyOf": [{"type": "string"}, {"type": "integer"}]
                            },
                        },
                        "msg": {"title": "Message", "type": "string"},
                        "type": {"title": "Error Type", "type": "string"},
                    },
                },
                "HTTPValidationError": {

                            "items": {
                                "anyOf": [{"type": "string"}, {"type": "integer"}]
                            },
                        },
                        "msg": {"title": "Message", "type": "string"},
                        "type": {"title": "Error Type", "type": "string"},
                    },
                },
                "HTTPValidationError": {

                            "items": {
                                "anyOf": [{"type": "string"}, {"type": "integer"}]
                            },
                        },
                        "msg": {"title": "Message", "type": "string"},
                        "type": {"title": "Error Type", "type": "string"},
                    },
                },
                "HTTPValidationError": {

}

// AuthFn should provide an authentication string for the given aud.
type AuthFn func() string

// ValidateAuthFn should check authentication for the given aud.
type ValidateAuthFn func(auth string) string

// Connection will return the connection for the specified host.
// If the host does not exist nil will be returned.
func (m *Manager) Connection(host string) *Connection {
	return m.targets[host]
}