dom deferredentityreferenceimpl entityreferenceimpl deferrednode serialversionuid l fnodeindex deferredentityreferenceimpl deferreddocumentimpl ownerdocument nodeindex ownerdocument fnodeindex nodeindex needssyncdata getnodeindex fnodeindex synchronizedata needssyncdata deferreddocumentimpl ownerdocument deferreddocumentimpl this.ownerdocument name ownerdocument.getnodename fnodeindex baseuri ownerdocument.getnodevalue fnodeindex synchronizechildren needssyncchildren isreadonly deferreddocumentimpl ownerdocument deferreddocumentimpl ownerdocument ownerdocument.synchronizechildren fnodeindex setreadonly