* not it adds a new one and returns this.
*
* @return {@link PdfSignatureBuildProperties}
*/
PdfSignatureBuildProperties getPdfSignatureBuildProperties() {
PdfSignatureBuildProperties buildPropDic = (PdfSignatureBuildProperties) getAsDict(PdfName.PROP_BUILD);
if (buildPropDic == null) {
buildPropDic = new PdfSignatureBuildProperties();
put(PdfName.PROP_BUILD, buildPropDic);
}
return buildPropDic;
}