code: def transform(self, ctx: Context, test_data):
      return self._scaler.transform(ctx, test_data)
  
imports: import logging
  import pandas
  from fate.arch import Context
  from ..abc.module import Module
label_desc: Use image node_id 3 for calling the FeatureScale obj's underlying member method code with example usage: obj.transform(ctx, test_data) and returns: self