code: def _set_time_axis_dataframe(self, df):
      time_axes = get_time_axes(df)
      num = len(time_axes)
      if num == 1:
          self.time_axis = time_axes[0]
      elif num == 0:
          raise ValueError(
              "No obvious time-axes found. Cannot generate stability report."
          )
      else:
          raise ValueError(
              f"Found {num} time-axes: {time_axes}. Set *one* time_axis manually!"
          )
  
imports: from pathlib import Path
  from typing import Any, Dict, List, Optional, Union
  import pandas
  from histogrammar.dfinterface.make_histograms import get_time_axes
  from pydantic import BaseModel
  from pydantic_settings import BaseSettings
  from typing_extensions import Literal
label_desc: Use image node_id 2 for calling the Settings obj's underlying member method code with example usage: obj._set_time_axis_dataframe(df) without return types