A container object decorated with a proxy attribute is intercepted when instantiated at runtime, and a component that is an instance of a type dynamically created at runtime is returned, which implements interfaces corresponding to each of the individual interfaces of the objects extended in the container object by delegating to the extended objects. Alternately, a similar container object, when instantiated at runtime, would return a proxy object which contains a lookup table that maps interfaces to the extended objects within the component. The proxy object intercepts all calls to the container object and redirects them appropriately to the proxy objects corresponding to the extended objects, which may in turn redirect calls appropriately.