modules/assembly-xml/src/main/java/org/apache/tuscany/sca/assembly/xml/BaseAssemblyProcessor.java [585:617]:
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    private void declareNamespace(Element element, String prefix, String ns) {
        if (ns == null) {
            ns = "";
        }
        if (prefix == null) {
            prefix = "";
        }
        String qname = null;
        if ("".equals(prefix)) {
            qname = "xmlns";
        } else {
            qname = "xmlns:" + prefix;
        }
        Node node = element;
        boolean declared = false;
        while (node != null && node.getNodeType() == Node.ELEMENT_NODE) {
            NamedNodeMap attrs = node.getAttributes();
            if (attrs == null) {
                break;
            }
            Node attr = attrs.getNamedItem(qname);
            if (attr != null) {
                declared = ns.equals(attr.getNodeValue());
                break;
            }
            node = node.getParentNode();
        }
        if (!declared) {
            org.w3c.dom.Attr attr = element.getOwnerDocument().createAttributeNS(XMLNS_ATTRIBUTE_NS_URI, qname);
            attr.setValue(ns);
            element.setAttributeNodeNS(attr);
        }
    }
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modules/binding-ws/src/main/java/org/apache/tuscany/sca/binding/ws/xml/EndPointReferenceHelper.java [142:174]:
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    private static void declareNamespace(Element element, String prefix, String ns) {
        if (ns == null) {
            ns = "";
        }
        if (prefix == null) {
            prefix = "";
        }
        String qname = null;
        if ("".equals(prefix)) {
            qname = "xmlns";
        } else {
            qname = "xmlns:" + prefix;
        }
        Node node = element;
        boolean declared = false;
        while (node != null && node.getNodeType() == Node.ELEMENT_NODE) {
            NamedNodeMap attrs = node.getAttributes();
            if (attrs == null) {
                break;
            }
            Node attr = attrs.getNamedItem(qname);
            if (attr != null) {
                declared = ns.equals(attr.getNodeValue());
                break;
            }
            node = node.getParentNode();
        }
        if (!declared) {
            org.w3c.dom.Attr attr = element.getOwnerDocument().createAttributeNS(XMLNS_ATTRIBUTE_NS_URI, qname);
            attr.setValue(ns);
            element.setAttributeNodeNS(attr);
        }
    }
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