* @since 20.0
 */
@Beta
@DoNotMock("Use NetworkBuilder to create a real instance")
@ElementTypesAreNonnullByDefault
public interface Network<N, E> extends SuccessorsFunction<N>, PredecessorsFunction<N> {
  //
  // Network-level accessors
  //

  /** Returns all nodes in this network, in the order specified by {@link #nodeOrder()}. */
  Set<N> nodes();

 * @since 20.0
 */
@Beta
@DoNotMock("Use NetworkBuilder to create a real instance")
@ElementTypesAreNonnullByDefault
public interface Network<N, E> extends SuccessorsFunction<N>, PredecessorsFunction<N> {
  //
  // Network-level accessors
  //

  /** Returns all nodes in this network, in the order specified by {@link #nodeOrder()}. */
  Set<N> nodes();