code: private void validateConversationState() {
          if (tc.isEntryEnabled())
              SibTr.entry(this, tc, "validateConversationState");
  
          if (sConState == null) {
              sConState = (ConversationState) getConversation().getAttachment();
              if (tc.isDebugEnabled())
                  SibTr.debug(this, tc, "Using Client Conversation State:", sConState);
          }
  
          if (tc.isEntryEnabled())
              SibTr.exit(this, tc, "validateConversationState");
      }
docs: Validates the conversation state by ensuring we have a local cache of it here in this class.