function undoChange()
{
if ($this->hasError()) {
$this->sendError();
}
if ($this->isApplied()) {
global $adb;
$result = $adb->pquery("SELECT * FROM `com_vtiger_workflowtasks` WHERE `task` like '%Update Contact Assigned To%'", array());
if ($result and $adb->num_rows($result) > 0) {
$this->sendMsg('<span style="font-size:large;weight:bold;">Workflows that use this task exist!! Please eliminate them before undoing this change.</span>');
} else {
$emm = new VTEntityMethodManager($adb);
$emm->removeEntityMethod("Accounts", "Update Contact Assigned To");
$this->markUndone(false);
$this->sendMsg('Changeset ' . get_class($this) . ' undone!');
}
} else {
$this->sendMsg('Changeset ' . get_class($this) . ' not applied, it cannot be undone!');
}
$this->finishExecution();
}
