}
for (ResearchCategoryList rcl:ResearchCategories.researchCategories.values()) {
for (ResearchItem ri:rcl.research.values()) {
if (ri.getPages()==null) continue;
for (int a=0;a<ri.getPages().length;a++) {
ResearchPage page = ri.getPages()[a];
if (page.recipeOutput!=null && stack !=null && page.recipeOutput.isItemEqual(stack)) {
keyCache.put(key,new Object[] {ri.key,a});
if (ThaumcraftApiHelper.isResearchComplete(player.getCommandSenderName(), ri.key))
return new Object[] {ri.key,a};
else