invoke
operator fun <SubjectT, FeatureT> invoke(featureExtractionStep: FeatureExtractorBuilder.FeatureExtractionStep<SubjectT>, featureExtraction: (SubjectT) -> Option<FeatureT>, featureExpectOptions: FeatureExpectOptions<FeatureT>): FeatureExtractorBuilder.FinalStep<SubjectT, FeatureT>(source)
Creates the FinalStep in the context of the FeatureExtractorBuilder.