Fix javadoc in partition based dataset
this closes
@@ -21,6 +21,7 @@ import org.apache.ignite.ml.dataset.DatasetBuilder;
import org.apache.ignite.ml.math.functions.IgniteBiFunction;
/**
+ * Trainer for preprocessor.
*
* @param <K> Type of a key in {@code upstream} data.
* @param <V> Type of a value in {@code upstream} data.
