@Override protected void step(){
  while (iter.hasNext()) {
    reg=(SvcReg)iter.next();
    if (reg.leaseExpiration > now)     return;
  }
  reg=null;
}

@ Override protected void step ( ) { while ( iter . hasNext ( ) ) { reg = ( SvcReg ) iter . next ( ) ; if ( reg . leaseExpiration > now ) return ; } reg = null ; }
set reg to the next matching element , or null if none
