How to use the cvpysdk.datacube.constants.IndexServerConstants function in cvpysdk

Response was empty.
        """
        if not (isinstance(index_server_roles, list) and isinstance(index_server_node_names, list)
                and isinstance(index_server_name, basestring)):
            raise SDKException('IndexServers', '101')
        cloud_meta_infos = {
            'INDEXLOCATION': index_directory,
            'REPLICATION': '1',
            'LANGUAGE': '0'
        }
        node_meta_infos = {
            'PORTNO': '20000',
            'JVMMAXMEMORY': '8191'
        }
        role_meta_infos = {}
        req_json = deepcopy(IndexServerConstants.REQUEST_JSON)
        req_json['cloudInfoEntity'] = {
            'cloudName': index_server_name,
            'cloudDisplayName': index_server_name
        }
        if is_cloud:
            index_pool_obj = self._commcell_object.index_pools[index_pool_name]
            req_json['type'] = 5
            req_json['solrCloudInfo']['cloudPoolInfo'] = {
                'cloudId': int(index_pool_obj['pool_id'])
            }
            role_meta_infos['ISCLOUDMODE'] = '3'
            node_meta_infos['WEBSERVER'] = 'true'
        for node_name in index_server_node_names:
            node_obj = self._commcell_object.clients[node_name]
            node_data = {
                "opType": IndexServerConstants.OPERATION_ADD,

def cloud_id(self):
        """Returns the cloud id of index server"""
        return self._properties[IndexServerConstants.CLOUD_ID]

def cloud_name(self):
        """Returns the internal cloud name of index server"""
        return self._properties[IndexServerConstants.CLOUD_NAME]

def client_name(self):
        """Returns the client name of index server"""
        return self._properties[IndexServerConstants.CLIENT_NAME]

def type(self):
        """Returns the type of index server"""
        return self._properties[IndexServerConstants.TYPE]

def index_server_client_id(self):
        """Returns the index server client id of index server"""
        return self._properties[IndexServerConstants.INDEX_SERVER_CLIENT_ID]

index_location      (str)       --  index server data directory
                node_name           (str)       --  index server node name
                node_params         (dict)      --  parameters to be passed
                                                    [
                                                        {
                                                            "name" : ,
                                                            "value" : 
                                                        }
                                                    ]
            Raises:
                SDKException:
                    Response was not success.
                    Response was empty.
        """
        json_req = deepcopy(IndexServerConstants.REQUEST_JSON)
        json_req['opType'] = IndexServerConstants.OPERATION_EDIT
        json_req['cloudNodes'] = [{
            "opType": IndexServerConstants.OPERATION_EDIT,
            "nodeClientEntity": {
                "clientId": int(self._commcell_obj.clients.get(node_name).client_id)
            },
            "nodeMetaInfos": [
                {
                    "name": "INDEXLOCATION",
                    "value": index_location
                }
            ]
        }]
        json_req['cloudInfoEntity']['cloudId'] = self.cloud_id
        for param in node_params:
            json_req['cloudNodes'][0]['nodeMetaInfos'].append(param)
        flag, response = self._cvpysdk_object.make_request(

def server_type(self):
        """Returns the server type of index server"""
        return self._properties[IndexServerConstants.SERVER_TYPE]

def client_id(self):
        """Returns the client id of index server"""
        return self._properties[IndexServerConstants.CLIENT_ID]

def host_name(self):
        """Returns the host name of index server"""
        return self._properties[IndexServerConstants.HOST_NAME]