public static HashSet readSetXml(InputStream in)
            throws XmlPullParserException, IOException {
        XmlPullParser parser = Xml.newPullParser();
        parser.setInput(in, null);
        return (HashSet) readValueXml(parser, new String[1]);
    }
Read a HashSet global an InputStream containing XML. The stream can
previously have been written by writeSetXml().

@param in The InputStream global which to read.
@return HashSet The resulting set.
@throws XmlPullParserException
@throws IOException
@see #readValueXml
@see #readThisSetXml
@see #writeSetXml
android/android_framework/base/src/main/java/github/tornaco/android/thanos/core/util/XmlUtils.java