How to use the azure-servicebus.azure.servicebus._common_serialization._XmlWriter function in azure-servicebus

def _convert_object_to_feed_entry(obj, rootName, content_writer):
    updated_str = datetime.utcnow().isoformat()
    if datetime.utcnow().utcoffset() is None:
        updated_str += '+00:00'

    writer = _XmlWriter()
    writer.preprocessor('')
    writer.start('entry', [
        ('xmlns:d', _XmlSchemas.DataServices, None),
        ('xmlns:m', _XmlSchemas.DataServicesMetadata, None),
        ('xmlns', _XmlSchemas.Atom, None),
        ])

    writer.element('title', '')
    writer.element('updated', updated_str)
    writer.start('author')
    writer.element('name', '')
    writer.end('author')
    writer.element('id', '')
    writer.start('content', [('type', 'application/xml', None)])
    writer.start(rootName, [
        ('xmlns:i', _XmlSchemas.SchemaInstance, None),