class_docstr: Dummy step that takes a single input and produces a single output.
class_docstr_tok: ["Dummy","step","that","takes","a","single","input","and","produces","a","single","output","."]
code: def transform(self, X):
      return 2 * X
  
imports: from sklearn.base import BaseEstimator
  from baikal import Step, make_step
label_desc: Use image node_id 2 for calling the DummySISO obj's underlying member method code with example usage: obj.transform(X) and returns: unknown