Github user felixcheung commented on a diff in the pull request:

    https://github.com/apache/spark/pull/14558#discussion_r74707500
  
    --- Diff: R/pkg/R/mllib.R ---
    @@ -142,15 +143,6 @@ setMethod("spark.glm", signature(data = 
"SparkDataFrame", formula = "formula"),
     #' Generalized Linear Models (R-compliant)
     #'
     #' Fits a generalized linear model, similarly to R's glm().
    -#' @param formula A symbolic description of the model to be fitted. 
Currently only a few formula
    --- End diff --
    
    Is there a reason we are moving these?
    
    As we have discussed, we should try to keep the documentation as close to 
the function definition/implementation as possible. That would make it a lot 
more easier to keep the code and documentation in sync, and to remind reviewers 
to check for them for correctness and consistency.
    
    Where there are cases where a @param description applies to two or more 
implementations (because it supports multiple classes) because of the lack of a 
common place we could put that in the generics.R for now.
    
    If `...` only shows up in generics.R - we should check if it's because it's 
to match an existing function signature, if it is then we add @param in 
generics.R. If it is not and it is not used anywhere we should consider 
removing the `...`
    
    Does that make sense?
    



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