code: def test_numpy_ravel():
      nr = NumpyRavel()
      nr, out = nr.fit_transform(np.ones((10, 11)))
      assert out.shape == (110,)
  
imports: import numpy
  from neuraxle.steps.numpy import NumpyConcatenateInnerFeatures, NumpyFlattenDatum, NumpyShapePrinter, NumpyTranspose, NumpyFFT, NumpyRavel
label_desc: Use image node_id 6 for calling a global function with example usage: test_numpy_ravel() without return types