These two files need to be swapped

diff --git a/PrinterElement.php b/PrinterAbstract1.php
similarity index 100%
rename from PrinterElement.php
rename to PrinterAbstract1.php

diff --git a/PrinterAbstract.php b/PrinterElement1.php
similarity index 100%
rename from PrinterAbstract.php
rename to PrinterElement1.php