code: ModuleConfig findActionInStack(String actionPath)
      {
          for ( int i = _stack.size() - 1; i >= 0; --i )
          {
              ModuleConfig moduleConfig = ((PushedPageFlow) _stack.elementAt(i)).getPageFlow().getModuleConfig();
              
              if (moduleConfig.findActionConfig(actionPath) != null) {
                  return moduleConfig;
              }
          }
      
          return null;
      }
docs: Internal (to our framework) method for seeing whether a given action exists in a page flow that is somewhere in
  the stack.  If so, the page flow's ModuleConfig is returned.