code: @Override
      public void dump(FormattedWriter fw, String arg)
      {
          if (TraceComponent.isAnyTracingEnabled() && tc.isEntryEnabled())
              SibTr.entry(this, tc, "dump", arg);
  
          if (arg != null)
          {
              if (arg.equalsIgnoreCase("raw"))
              {
                  dumpRaw(fw);
              }
              else if (arg.equalsIgnoreCase("all"))
              {
                  dumpAll(fw);
              }
              else
              {
                  dump(fw);
              }
          }
          else
          {
              dump(fw);
          }
  
          if (TraceComponent.isAnyTracingEnabled() && tc.isEntryEnabled())
              SibTr.exit(this, tc, "dump");
      }
docs: Dump message store.
  This method is called from the Messaging Engine MBean.
  
  @param fw The FormattedWriter passed in by the ME.
  @param arg the dump specification if any. This may be
  null to invoke the internal diagnostics dump
  "raw" to invoke the raw (persistence) dump.
  "all" to invoke the internal & raw dump, including item information