code: def test_dtype_support(dtype):
      img = np.random.rand(28, 28).astype(dtype)
  
      # Simply run the function to assert that it runs without error
      slic(img, start_label=1, channel_axis=None)
  
imports: from itertools import product
  import numpy
  import pytest
  from numpy.testing import assert_equal
  from skimage import data, filters, img_as_float
  from skimage._shared.testing import run_in_parallel, expected_warnings
  from skimage.segmentation import slic
label_desc: Use image node_id 25 for calling a global function with example usage: test_dtype_support(dtype) without return types