code: def create_empty_figure():
      return plot_timeseries(pd.DataFrame(index=pd.DatetimeIndex([])))
  
file_path: merlion/merlion/dashboard/pages/utils.py
imports: import dash_bootstrap_components
  from dash import html, dash_table
  import pandas
  from merlion.dashboard.settings import *
  from merlion.dashboard.utils.plot import plot_timeseries
label_desc: Use image node_id 4 for calling a global function with example usage: create_empty_figure() and returns: plot_timeseries