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