#define GUPPI_CATEGORY_IMPL0 (obj) #define GUPPI_IS_CATEGORY_IMPL0 (obj) GtkObject* guppi_category_impl_new (void);
GtkObject +----GuppiDataImpl +----GuppiCategoryImpl
#define GUPPI_CATEGORY_IMPL0(obj) ((obj) ? (GUPPI_CATEGORY_IMPL(obj)) : NULL)
#define GUPPI_IS_CATEGORY_IMPL0(obj) (((obj) == NULL) || (GUPPI_IS_CATEGORY_IMPL(obj)))
GtkObject* guppi_category_impl_new (void);