code: def comparison_phase(
      self,
      base_run,
      base_worker,
      base_span,
      exp_run,
      exp_worker,
      exp_span,
  ):
      pass
  
imports: import json
  from .profiler_reader import ProfilerReader
  from visualdl.server.api import gen_result
  from visualdl.server.api import result
label_desc: Use image node_id 30 for calling the ProfilerApi obj's underlying member method code with example usage: obj.comparison_phase(base_run, base_worker, base_span, exp_run, exp_worker, exp_span) without return types