code: def test_check_label_or_level_ambiguity_series(df):
      # A series has no columns and therefore references are never ambiguous
  
      # Make series with L1 as index
      s = df.set_index("L1").L2
      s._check_label_or_level_ambiguity("L1", axis=0)
      s._check_label_or_level_ambiguity("L2", axis=0)
  
      # Make series with L1 and L2 as index
      s = df.set_index(["L1", "L2"]).L3
      s._check_label_or_level_ambiguity("L1", axis=0)
      s._check_label_or_level_ambiguity("L2", axis=0)
      s._check_label_or_level_ambiguity("L3", axis=0)
  
imports: import pytest
  from pandas.core.dtypes.missing import array_equivalent
  import pandas
label_desc: Use image node_id 12 for calling a global function with example usage: test_check_label_or_level_ambiguity_series(df) without return types