code: public void removeAllTopicAcls()
    {
      if (TraceComponent.isAnyTracingEnabled() && tc.isEntryEnabled())
        SibTr.entry(tc, "removeAllTopicAcls");
  
      ArrayList topicAclList = null;
  
      try
      {
        // Remove from the HashMap, with synch, there may be other accessors
        synchronized(_targets)
        {
          // Build a list of the existing ACLs
          topicAclList = new ArrayList(_targets.size());
  
          Iterator itr = _targets.keySet().iterator();
  
          while (itr.hasNext())
          {
            Object key = itr.next();
            if (key instanceof TopicAcl)
            {
              topicAclList.add(key);
            }
          }
  
          // Now remove the ACLs from the targets Map
          Iterator aclIter = topicAclList.iterator();
  
          while (aclIter.hasNext())
          {
            Object key = aclIter.next();
            removeTarget(key);
          }
        }
      }
      catch (MatchingException e)
       {
         FFDCFilter.processException(
           e,
           "com.ibm.ws.sib.processor.matching.MessageProcessorMatching.removeAllTopicAcls",
           "1:2188:1.117.1.11",
           this);
  
         SibTr.exception(tc, e);
  
         if (TraceComponent.isAnyTracingEnabled() && tc.isEntryEnabled())
           SibTr.exit(tc, "removeAllTopicAcls", "SICoreException");
  
         SibTr.error(tc, "INTERNAL_MESSAGING_ERROR_CWSIP0002",
           new Object[] {
             "com.ibm.ws.sib.processor.matching.MessageProcessorMatching",
             "1:2199:1.117.1.11",
             e });
  
         throw new SIErrorException(
           nls.getFormattedMessage(
             "INTERNAL_MESSAGING_ERROR_CWSIP0002",
             new Object[] {
               "com.ibm.ws.sib.processor.matching.MessageProcessorMatching",
               "1:2207:1.117.1.11",
               e },
             null),
           e);
       }
      if (TraceComponent.isAnyTracingEnabled() && tc.isEntryEnabled())
        SibTr.exit(tc, "removeAllTopicAcls");
  
    }
docs: Method removeAllTopicAcls
  Used to remove all TopicAcls stored in the matchspace