TCPDF::commitTransaction()
Method: Delete the copy of the current TCPDF object used for undo operation.
Source: includes/lib/tcpdf/tcpdf.php:21740
TCPDF::rollbackTransaction()
Method: This method allows to undo the latest transaction by returning the latest saved TCPDF object with startTransaction().
Source: includes/lib/tcpdf/tcpdf.php:21754
TCPDF::startTransaction()
Method: Stores a copy of the current TCPDF object used for undo operation.
Source: includes/lib/tcpdf/tcpdf.php:21723
TCPDF_STATIC::objclone()
Method: Creates a copy of a class object
Source: includes/lib/tcpdf/include/tcpdf_static.php:330