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

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