Github user hhbyyh commented on the issue:
https://github.com/apache/spark/pull/16194
Sorry but I would still strongly prefer to override the toString() in Model
or Params. The default implementation can provide more information about the
params. And only in a few cases you need to override the default implementation.
More specifically,
```
override def toString = s"${this.logName}(uid=$uid)" +
this.params.map(p => p.name + ": " + $(p)).mkString(" {\n ", "\n ",
"\n}")
// or use this.extractParamMap().toString()
```
would give a result:
```
org.apache.spark.ml.clustering.NewModel(uid=1122) {
featuresCol: features
initMode: k-means||
initSteps: 2
k: 2
maxIter: 20
predictionCol: prediction
seed: 1387313927
tol: 1.0E-4
}
```
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