this.bypassReorderHistory = blockBagExtent;
this.bypassHistory = reorderExtent;
this.bypassNone = extent;
} else {
Extent extent = new NullExtent();
extent = survivalExtent = new SurvivalModeExtent(extent, NullWorld.getInstance());
extent = blockBagExtent = new BlockBagExtent(extent, blockBag);
extent = reorderExtent = new MultiStageReorder(extent, false);
extent = maskingExtent = new MaskingExtent(extent, Masks.alwaysTrue());
extent = changeLimiter = new BlockChangeLimiter(extent, maxBlocks);