<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def validateAllServers(self):
 """ This operation provides status information about a specific ArcGIS Server federated with Portal for ArcGIS. Parameters: serverId - unique id of the server """

        url = self._url + "/servers/validate"
        params = {"f" : "json"}
        return self._get(url=url,
                         param_dict=params,
                         proxy_port=self._proxy_port,
                         proxy_url=self._proxy_ur)