char key[INSTR_DEFAULT_STR_SIZE];
snprintf (key, INSTR_DEFAULT_STR_SIZE, "%s-%s-%s", name, source->id, dest->id);
ret = newType (name, key, NULL, TYPE_LINK, father);
char key[INSTR_DEFAULT_STR_SIZE];
snprintf (key, INSTR_DEFAULT_STR_SIZE, "%s-%s-%s", name, source->id, dest->id);
ret = newType (name, key, NULL, TYPE_LINK, father);