Github user skyluc commented on the pull request:
https://github.com/apache/spark/pull/8433#issuecomment-135661207
It indicates on which of the elements generated for the class parameter to
apply the annotation.
There are 4 possible elements generated for a class parameter: the
constructor parameter, the field, the getter and the setter (and more for
beans).
I would expect `@(transient @field)` to be enough, for the cases when a
field is actually created, but the warning is not resolve until `@param` is
added too. I haven't dig on why the compiler complain in this case.
The base question was mostly: do we want to remove the `@transient`
annotation which have no effect at all (no field generated by the compiler).
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