// we need a cast as wxFontMapper is not fully declared here and so the
// compiler can't know that it derives from wxFontMapperBase (but
// run-time behaviour will be correct because the dtor is virtual)
// we need a cast as wxFontMapper is not fully declared here and so the
// compiler can't know that it derives from wxFontMapperBase (but
// run-time behaviour will be correct because the dtor is virtual)