@Deprecated
  public static <N, V> ImmutableValueGraph<N, V> copyOf(ImmutableValueGraph<N, V> graph) {
    return checkNotNull(graph);
  }
@Deprecated
  public static <N, V> ImmutableValueGraph<N, V> copyOf(ImmutableValueGraph<N, V> graph) {
    return checkNotNull(graph);
  }
@ Deprecated public static < N , V > ImmutableValueGraph < N , V > copyOf ( ImmutableValueGraph < N , V > graph ) { return checkNotNull ( graph ) ; }
Simply returns its argument.

@deprecated no need to use this
Simply returns its argument .