#define GUPPI_STRUCT_IMPL0 (obj) #define GUPPI_IS_STRUCT_IMPL0 (obj) GtkObject* guppi_struct_impl_new (void);
GtkObject +----GuppiDataImpl +----GuppiStructImpl
#define GUPPI_STRUCT_IMPL0(obj) ((obj) ? (GUPPI_STRUCT_IMPL(obj)) : NULL)
#define GUPPI_IS_STRUCT_IMPL0(obj) (((obj) == NULL) || (GUPPI_IS_STRUCT_IMPL(obj)))
GtkObject* guppi_struct_impl_new (void);