code: def gen_incrementing_alphabets(length):
      assert (
          65 + length < 96
      ), "we only support up to 26 targets at a time."
      # 65: ascii code of 'A'.
      return list(map(chr, range(65, 65 + length)))
  
file_path: ray/python/ray/dashboard/modules/metrics/grafana_dashboard_factory.py
imports: import copy
  from dataclasses import asdict
  import json
  import os
  from typing import List, Tuple
  import ray
  from ray.dashboard.modules.metrics.dashboards.common import DashboardConfig, Panel
  from ray.dashboard.modules.metrics.dashboards.default_dashboard_panels import default_dashboard_config
  from ray.dashboard.modules.metrics.dashboards.serve_dashboard_panels import serve_dashboard_config
  from ray.dashboard.modules.metrics.dashboards.serve_deployment_dashboard_panels import serve_deployment_dashboard_config
  from ray.dashboard.modules.metrics.dashboards.data_dashboard_panels import data_dashboard_config
label_desc: Use image node_id 8 for calling a global function with example usage: gen_incrementing_alphabets(length) and returns: list