code: protected IStreamAwareScopeHandler getStreamAwareHandler() {
          if (scope != null) {
              IScopeHandler handler = scope.getHandler();
              if (handler instanceof IStreamAwareScopeHandler) {
                  return (IStreamAwareScopeHandler) handler;
              }
          }
          return null;
      }
docs: Return stream aware scope handler or null if scope is null.
  
  @return IStreamAwareScopeHandler implementation