-void userSuppliedMirrorFunction (uint8_t *im, gdcm::File *f);
-void userSuppliedUpsideDownFunction(uint8_t *im, gdcm::File *f);
-bool userSuppliedLessThanFunction(gdcm::File *f1, gdcm::File *f2);
-bool userSuppliedLessThanFunction2(gdcm::File *f1, gdcm::File *f2);
+void userSuppliedMirrorFunction (uint8_t *im, GDCM_NAME_SPACE::File *f);
+void userSuppliedUpsideDownFunction(uint8_t *im, GDCM_NAME_SPACE::File *f);
+bool userSuppliedLessThanFunction(GDCM_NAME_SPACE::File *f1, GDCM_NAME_SPACE::File *f2);
+bool userSuppliedLessThanFunction2(GDCM_NAME_SPACE::File *f1, GDCM_NAME_SPACE::File *f2);