* @param pdfDoc a document
*/
PDFLogicalStructureHandler(PDFDocument pdfDoc, EventBroadcaster eventBroadcaster) {
this.pdfDoc = pdfDoc;
this.eventBroadcaster = eventBroadcaster;
PDFStructTreeRoot structTreeRoot = pdfDoc.getFactory().makeStructTreeRoot(parentTree);
rootStructureElement = pdfDoc.getFactory().makeStructureElement(
FOToPDFRoleMap.mapFormattingObject("root", structTreeRoot), structTreeRoot);
structTreeRoot.addKid(rootStructureElement);
}