code: def test_load_empatica_data():
      df_ibi = load_empatica_data("ibi")[0]
      assert "IBI" in df_ibi.columns
  
      df_ibi, df_gsr = load_empatica_data(["IBI", "gsr"])
      assert "EDA" in df_gsr.columns
  
imports: import pandas
  from tsflex.utils.data import load_empatica_data
  from tsflex.utils.time import timedelta_to_str
label_desc: Use image node_id 2 for calling a global function with example usage: test_load_empatica_data() without return types