code: def test_numpy_dtypes(source_dtypes, expected_common_dtype):
      source_dtypes = [pandas_dtype(x) for x in source_dtypes]
      assert find_common_type(source_dtypes) == expected_common_dtype
  
file_path: pandas/pandas/tests/dtypes/cast/test_find_common_type.py
imports: import numpy
  import pytest
  from pandas.core.dtypes.cast import find_common_type
  from pandas.core.dtypes.common import pandas_dtype
  from pandas.core.dtypes.dtypes import CategoricalDtype, DatetimeTZDtype, IntervalDtype, PeriodDtype
  from pandas import Categorical, Index
label_desc: Use image node_id 1 for calling a global function with example usage: test_numpy_dtypes(source_dtypes, expected_common_dtype) without return types