I follow the example of https://ci.apache.org/projects/flink/flink-docs-release-1.0/apis/batch/libs/ml/multiple_linear_regression.html but in the example the fit function only need one param,but in my code , fit require three params,
mlr.fit(training, fitParameters, fitOperation);
I thought fitParameters may be a alternative for setIterations(),setStepsize() but what is fitOperation?