/* the 'vtable': declare function pointers here, eg.: */
void (*add_operation_func) (ModestProgressObject *self, ModestMailOperation *mail_op);
void (*remove_operation_func) (ModestProgressObject *self, ModestMailOperation *mail_op);
/* the 'vtable': declare function pointers here, eg.: */
void (*add_operation_func) (ModestProgressObject *self, ModestMailOperation *mail_op);
void (*remove_operation_func) (ModestProgressObject *self, ModestMailOperation *mail_op);