code: def test_numpy_fft():
      fft = NumpyFFT()
      fft.fit_transform(np.ones((10, 11)))
  
imports: import numpy
  from neuraxle.steps.numpy import NumpyConcatenateInnerFeatures, NumpyFlattenDatum, NumpyShapePrinter, NumpyTranspose, NumpyFFT, NumpyRavel
label_desc: Use image node_id 5 for calling a global function with example usage: test_numpy_fft() without return types