Map(2 -> Hello, 1 -> World)
Map(5 -> Foo, 4 -> Bar)
Map(5 -> Foo, 4 -> Bar, 2 -> Hello, 1 -> World)
Map(3 -> ?, 2 -> Hello, 1 -> World)
Map(2 -> Hello, 1 -> World)
Map(5 -> Foo, 4 -> Bar)
Map(5 -> Foo, 4 -> Bar, 2 -> Hello, 1 -> World)
Map(3 -> ?, 2 -> Hello, 1 -> World)