stringstream Node1 stringstream     Node2 std::basic_stringstream < Char >     Node2->Node1 Node3 std::basic_iostream < Char >     Node3->Node2 Node4 std::basic_istream < Char >     Node4->Node3 Node5 std::basic_ios< Char >     Node5->Node4 Node7 std::basic_ostream < Char >     Node5->Node7 Node6 std::ios_base     Node6->Node5 Node7->Node3