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// Entities A, B and C are currently in // namespace m. namespace m; class A{} interface B{} class C{} // To redefine the namespace of an // entity, use the --redefine option. // B is now in namespace n. namespace n --redefine; interface B{} // If --redefine is not used, a warning will // be issued when trying to redefine the // namespace of an entity namespace p; class C{} // Using namepace -; will deactivate the last // declared namespace. There will not be an // attempt to redefine the namespace of interface // B and a warning will not be issued namespace -; interface B{}