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#include "<strong>Poco</strong>/DynamicFactory.h"<br />
#include "<strong>Poco</strong>/SharedPtr.h"<br />
using <strong>Poco</strong>::DynamicFactory;<br />
using <strong>Poco</strong>::SharedPtr;<br />
class Base<br />
{<br />
};<br />
class A: public Base<br />
{<br />
};<br />
class B: public Base<br />
{<br />
};