code: def defaults(cls):
      return dict(
          series_preferences=[],
          chart_type=0,
          errors=[],
          step_range=[-1, -1],
          focus_smoothed=True,
      )
  
imports: from typing import Dict, List, Any, Union
label_desc: Use image node_id 1 for calling the Preferences obj's underlying member method code with example usage: obj.defaults(cls) and returns: dict