XBT_PUBLIC(double) sg_link_latency(Link *link);
XBT_PUBLIC(void*) sg_link_data(Link *link);
XBT_PUBLIC(void) sg_link_data_set(Link *link,void *data);
XBT_PUBLIC(double) sg_link_latency(Link *link);
XBT_PUBLIC(void*) sg_link_data(Link *link);
XBT_PUBLIC(void) sg_link_data_set(Link *link,void *data);