// OgreMain/src/OgreResourceGroupManager.cpp
LoadUnloadResourceSet* loadList;                                                       
  if (i == grp.loadResourceOrderMap.end())                                               
  {                                                                                      
    loadList = OGRE_NEW_T(LoadUnloadResourceSet, MEMCATEGORY_RESOURCE)();              
    grp.loadResourceOrderMap[order] = loadList;                                        
  }                                                                                      
  else
//...