private boolean moduleFunctionFlag(VirtualFrame frame) { final FrameSlot moduleFunctionFlagSlot = frame.getFrameDescriptor().findFrameSlot(RubyModule.MODULE_FUNCTION_FLAG_FRAME_SLOT_ID); if (moduleFunctionFlagSlot == null) { return false; } else { Object moduleFunctionObject; try { moduleFunctionObject = frame.getObject(moduleFunctionFlagSlot); } catch (FrameSlotTypeException e) { throw new RuntimeException(e); } return (moduleFunctionObject instanceof Boolean) && (boolean) moduleFunctionObject; } }