public org.w3c.dom.Element signXML(org.w3c.dom.Document doc,java.lang.String certAlias) throws XMLSignatureException {
  return signXML(doc,certAlias,null);
}

public org . w3c . dom . Element signXML ( org . w3c . dom . Document doc , java . lang . String certAlias ) throws XMLSignatureException { return signXML ( doc , certAlias , null ) ; }
sign the xml document using enveloped signatures .
