code: def test_transform_prep():
      """[Parallel | Layer | Manual | Blend | No Proba | Prep] test transform"""
      args = get_layer("transform", "manual", "blend", False, True)
      run_layer(*args)
  
file_path: mlens/mlens/parallel/tests/test_b1_layer_blend.py
imports: from mlens.testing import Data, EstimatorContainer, get_layer, run_layer
label_desc: Use image node_id 6 for calling a global function with example usage: test_transform_prep() without return types