public void removePriorityUnit(String id){
  if (!StringUtil.isPositiveInteger(id)) {
    return;
  }
  removePriorityUnit(Integer.parseInt(id));
}

public void removePriorityUnit ( String id ) { if ( ! StringUtil . isPositiveInteger ( id ) ) { return ; } removePriorityUnit ( Integer . parseInt ( id ) ) ; }
remove a unit from the priority target list .
