def stats(self, node_id=None, metric=None, index_metric=None, params=None):
        """
        The cluster nodes stats API allows to retrieve one or more (or all) of
        the cluster nodes statistics.
        `<https://www.elastic.co/guide/en/elasticsearch/reference/current/cluster-nodes-stats.html>`_

        :arg node_id: A comma-separated list of node IDs or names to limit the
            returned information; use `_local` to return information from the
            node you're connecting to, leave empty to get information from all
            nodes
        :arg metric: Limit the information returned to the specified metrics
        :arg index_metric: Limit the information returned for `indices` metric
            to the specific index metrics. Isn't used if `indices` (or `all`)
            metric isn't specified.
        :arg completion_fields: A comma-separated list of fields for `fielddata`
            and `suggest` index metric (supports wildcards)
        :arg fielddata_fields: A comma-separated list of fields for `fielddata`
            index metric (supports wildcards)
        :arg fields: A comma-separated list of fields for `fielddata` and
            `completion` index metric (supports wildcards)
        :arg groups: A comma-separated list of search groups for `search` index
            metric
        :arg include_segment_file_sizes: Whether to report the aggregated disk
            usage of each one of the Lucene index files (only applies if segment
            stats are requested), default False
        :arg level: Return indices stats aggregated at index, node or shard
            level, default 'node', valid choices are: 'indices', 'node',
            'shards'
        :arg timeout: Explicit operation timeout
        :arg types: A comma-separated list of document types for the `indexing`
            index metric
        """
        return self.transport.perform_request(
            "GET",
            _make_path("_nodes", node_id, "stats", metric, index_metric),
            params=params,
        )