Github user HyukjinKwon commented on the issue:
https://github.com/apache/spark/pull/22591
```
// before
ds.withColumnRenamed("first_name", "firstName")
.withColumnRenamed("last_name", "lastName")
.withColumnRenamed("postal_code", "postalCode")
// after
ds.withColumnsRenamed(
"first_name" -> "firstName",
"last_name" -> "lastName",
"postal_code" -> "postalCode"
)
// or
ds.withColumnsRenamed(Map(
"first_name" -> "firstName",
"last_name" -> "lastName",
"postal_code" -> "postalCode"
))
```
This doesn't looks useful or making the codes even shorter. I don't think
we should add this.
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