Create functions for using Methods

[Felixmil]

R users are really not used to the $ way to use methods (to be honest I don't think most of them know about the object and methods principles). So I'm suggesting we add a layer of user friendly functions that call these method under the hood.

Here's a theorical example:

createDataCombined <- function(){
   invisible(DataCombined$new())
}

addSimulationResults <- function(dataCombined, simulationResults, outputPath, names, groups){
  dataCombined$addSimulationResults(
    simulationResults = simulationResults,
    quantitiesOrPaths = outputPath,
    names = names,
    groups = groups
  )
   invisible(dataCombined)
}

...

This way, users could chain calls:

myDataCombined <-
  createDataCombined |>
  addSimulationresults(simulationResults, outputPath, names, groups) |>
  addDataSets(list(dataSet1, dataSet2), ...)

[PavelBal]

Yes, probably we should do it (at least for the most frequently used methods).

Though I really hate it (polluting the namespace), it will make the package more accessible for the "average" R user.