code: def test_to_table_with_mixed_string_int_column():
      # Build DataFrame with one Decimal column
      df = pd.DataFrame({"a": [1, 2, 3], "b": ["A", "B", 3]})
      assert df["b"].dtype.kind == "O"
  
      # Convert to pyarrow table
      pa_table = to_arrow_table(df)
  
      # Check that pyarrow type is float64 (not Decimal128)
      b_type = pa_table.column("b").type
      assert b_type == pa.string()
  
file_path: vegafusion/python/vegafusion/tests/test_transformer.py
imports: import pandas
  import pyarrow
  from decimal import Decimal
  from vegafusion.transformer import to_arrow_table
label_desc: Use image node_id 3 for calling a global function with example usage: test_to_table_with_mixed_string_int_column() without return types