code: def all_available_metrics():
      return get_metric_names([classi, reg])
  
file_path: FATE/python/fate/ml/evaluation/tool.py
imports: import inspect
  from fate.ml.evaluation import classification
  from fate.ml.evaluation import regression
  from fate.ml.evaluation.metric_base import Metric, MetricEnsemble
label_desc: Use image node_id 2 for calling a global function with example usage: all_available_metrics() and returns: get_metric_names