private function _registerMetaBox($sPageSlug)
{
add_meta_box($this->oProp->sMetaBoxID, $this->oProp->sTitle, array($this, '_replyToPrintMetaBoxContents'), $this->oProp->_getScreenIDOfPage($sPageSlug), $this->oProp->sContext, $this->oProp->sPriority, null);
}