code: def test_transform_dtypes(self, array):
      result = dpp.LabelEncoder().fit_transform(array)
      assert result.dtype == np.intp
      if dask.is_dask_collection(array):
          assert result.dtype == result.compute().dtype
  
imports: import dask
  import dask.array
  import dask.dataframe
  import numpy
  import pandas
  import pytest
  import sklearn.preprocessing
  from dask.array.utils import assert_eq
  import dask_ml.preprocessing
  from dask_ml.utils import assert_estimator_equal
label_desc: Use image node_id 4 for calling the TestLabelEncoder obj's underlying member method code with example usage: obj.test_transform_dtypes(array) without return types