public void marshal(Node parent, String dsPrefix, DOMCryptoContext context)
      throws MarshalException {
    if (log.isLoggable(Level.FINE)) {
      log.log(Level.FINE, "Marshalling Reference");
    }
    Document ownerDoc = DOMUtils.getOwnerDocument(parent);

    refElem = DOMUtils.createElement(ownerDoc, "Reference", XMLSignature.XMLNS, dsPrefix);

    // set attributes
    DOMUtils.setAttributeID(refElem, "Id", id);
    DOMUtils.setAttribute(refElem, "URI", uri);
    DOMUtils.setAttribute(refElem, "Type", type);

    // create and append Transforms element
    if (!transforms.isEmpty() || !appliedTransforms.isEmpty()) {
      Element transformsElem =
          DOMUtils.createElement(ownerDoc, "Transforms", XMLSignature.XMLNS, dsPrefix);
      refElem.appendChild(transformsElem);
      for (int i = 0, size = appliedTransforms.size(); i < size; i++) {
        DOMStructure transform = (DOMStructure) appliedTransforms.get(i);
        transform.marshal(transformsElem, dsPrefix, context);
      }
      for (int i = 0, size = transforms.size(); i < size; i++) {
        DOMStructure transform = (DOMStructure) transforms.get(i);
        transform.marshal(transformsElem, dsPrefix, context);
      }
    }

    // create and append DigestMethod element
    ((DOMDigestMethod) digestMethod).marshal(refElem, dsPrefix, context);

    // create and append DigestValue element
    if (log.isLoggable(Level.FINE)) {
      log.log(Level.FINE, "Adding digestValueElem");
    }
    Element digestValueElem =
        DOMUtils.createElement(ownerDoc, "DigestValue", XMLSignature.XMLNS, dsPrefix);
    if (digestValue != null) {
      digestValueElem.appendChild(ownerDoc.createTextNode(Base64.encode(digestValue)));
    }
    refElem.appendChild(digestValueElem);

    parent.appendChild(refElem);
    here = refElem.getAttributeNodeNS(null, "URI");
  }
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  public void marshal(Node parent, String dsPrefix, DOMCryptoContext context)
      throws MarshalException {
    Document ownerDoc = DOMUtils.getOwnerDocument(parent);

    Element objElem = DOMUtils.createElement(ownerDoc, "Object", XMLSignature.XMLNS, dsPrefix);

    // set attributes
    DOMUtils.setAttributeID(objElem, "Id", id);
    DOMUtils.setAttribute(objElem, "MimeType", mimeType);
    DOMUtils.setAttribute(objElem, "Encoding", encoding);

    // create and append any elements and mixed content, if necessary
    for (int i = 0, size = content.size(); i < size; i++) {
      XMLStructure object = (XMLStructure) content.get(i);
      if (object instanceof DOMStructure) {
        ((DOMStructure) object).marshal(objElem, dsPrefix, context);
      } else {
        javax.xml.crypto.dom.DOMStructure domObject = (javax.xml.crypto.dom.DOMStructure) object;
        DOMUtils.appendChild(objElem, domObject.getNode());
      }
    }

    parent.appendChild(objElem);
  }