docs: private void emergencyClose() {
          if (TraceComponent.isAnyTracingEnabled() && tc.isEntryEnabled())
              SibTr.entry(this, tc, "emergencyClose");
  
          try {
              if (coreConsumerSession != null)
                  coreConsumerSession.close();
          } catch (SIException e) {
              // No FFDC code needed
              // d238447 FFDC review - ok
              FFDCFilter.processException(e, "com.ibm.ws.sib.api.jms.impl.JmsMsgConsumerImpl", "emergencyClose#1", this);
          } finally {
              // d245254 - set the consumer session to null so that subsequent stop/close calls
              // don't generate exceptions.
              coreConsumerSession = null;
              // set the closed flag so that the majority of methods calls will generate an appopriate exception
              // Note that this is not synchronized on the closeLock as we don't want to risk this blocking.
              closed = true;
          }
  
          if (TraceComponent.isAnyTracingEnabled() && tc.isEntryEnabled())
              SibTr.exit(this, tc, "emergencyClose");
      }