code: def _generate_filename(
      tuner_type, alpha, performance_metric, fairness_metric
  ):
      now = datetime.now()
      time_string = now.strftime("%Y%m%d_%H%M%S")
  
      return (
          "_".join(
              [
                  tuner_type,
                  str(alpha),
                  performance_metric,
                  fairness_metric,
                  time_string,
              ]
          )
          + ".html"
      )
  
file_path: aequitas/src/aequitas/fairflow/plots/pareto/visualize.py
imports: import json
  from datetime import datetime
  from string import Template
  from uuid import uuid4
  import numpy
  import pkg_resources
  from .plot import Plot
label_desc: Use image node_id 2 for calling a global function with example usage: _generate_filename(tuner_type, alpha, performance_metric, fairness_metric) and returns: unknown