Github user gianmarcodonetti commented on the issue:
https://github.com/apache/spark/pull/20258
@HyukjinKwon in my opinion, it helps a lot.
My goal is to avoid this case:
`final_rdd = func_3(func_2(func_1(initial_rdd)))`
And admit this:
`final_rdd = initial_rdd.apply(func_1).apply(func_2).apply(func_3)`
More functional and readable...
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