The following files are included in the UI for PHP source distribution:
kendoui\wrappers\php\lib\Kendo\UI\PDFViewerDplProcessing.download.php
kendoui\wrappers\php\lib\Kendo\UI\PDFViewerDplProcessing.read.php
kendoui\wrappers\php\lib\Kendo\UI\PDFViewerDplProcessing.upload.php
The files are also duplicated with:
PDFViewerDplProcessingDownload.php,
PDFViewerDplProcessingRead.php
PDFViewerDplProcessingUpload.php
The DplProcessing should not be included in the UI for PHP source distribution