def attr(self, name, lineno=None):
        return nodes.ExtensionAttribute(self.identifier, name, lineno=lineno)
Find a SessionHandler instance in the list and move it to the beginning.
dataset/ETHPy150Open AppScale/appscale/AppServer/lib/jinja2-2.6/jinja2/ext.py/Extension.attr--crossover with--dataset/ETHPy150Open kuri65536/python-for-android/python3-alpha/python-libs/pyxmpp2/client.py/_move_session_handler