class_docstr: Fit method is automatically implemented as changing nothing.
  Please make your steps inherit from NonFittableMixin, when they don't need any fitting.
  Also, make sure that BaseStep is the last step you inherit from.
  Note that we could also define the inverse_transform method in the present object.
code: def __init__(self):
      BaseStep.__init__(self)
      NonFittableMixin.__init__(self)
  
file_path: Neuraxle/examples/getting_started/plot_non_fittable_mixin.py
imports: import numpy
  from neuraxle.base import NonTransformableMixin, Identity, BaseStep, NonFittableMixin
  from neuraxle.pipeline import Pipeline
label_desc: Use image node_id 1 to create a new NonFittableStep object from inherited base classes: NonFittableMixin, BaseStep with example: obj = NonFittableStep()