private void addPages(){
for(int i = 0; i < UpgradeRenderHandlerList.instance().upgradeRenderers.size(); i++) {
if(init || CommonHUDHandler.getHandlerForPlayer().upgradeRenderersInserted[i]) {
IUpgradeRenderHandler upgradeRenderHandler = UpgradeRenderHandlerList.instance().upgradeRenderers.get(i);
IOptionPage optionPage = upgradeRenderHandler.getGuiOptionsPage();
if(optionPage != null) {
upgradePageNames.add(upgradeRenderHandler.getUpgradeName());
upgradePages.add(optionPage);
}
}