code: def get_num_names_owned( state_engine, checked_ops, sender ):
      
      
      count = 0
      registers = find_by_opcode( checked_ops, "NAME_REGISTRATION" )
  
      for reg in registers:
          if reg['sender'] == sender:
              count += 1
  
      count += len( state_engine.get_names_owned_by_sender( sender ) )
      log.debug("Sender '%s' owns %s names" % (sender, count))
      return count
docs: Find out how many preorders a given sender (i.e. a script)
      actually owns, as of this transaction.