def heartbeat(self):
        if self._session is not None:
            url = '%s/sessions/v1/%s' % (self._base, self._session)
            self._do_put(url, '')
:param java_sources: Java libraries this library has a *circular*
dataset/ETHPy150Open francelabs/datafari/debian7/zookeeper/src/contrib/huebrowser/zkui/src/zkui/rest.py/ZooKeeper.heartbeat--crossover with--dataset/ETHPy150Open pantsbuild/pants/src/python/pants/backend/jvm/targets/scala_library.py/ScalaLibrary.__init__