public void addNamespace(String prefix, String uri) {
      prefixToUri.put(prefix, uri);
      uriToPrefix.put(uri, prefix);
    }
An object used by an XPath query that maps namespaces to uris.

@see NamespaceContext
geode-core/src/main/java/org/apache/geode/management/internal/configuration/utils/XmlUtils.java