33     if (er->from == engine && 
GroupIsInGroup(group, er->group_id)) 
return er;
 
   73   if (replace_when_old != NULL) *replace_when_old = er == NULL ? 
false : er->
replace_when_old;
 
  103     er->group_id = group;
 
  128     if (er->from == engine && er->group_id == group) {
 
  135           prev->next = er->next;