Returns the ParamHelpers::ParamSet from a Learner.
Other learner: LearnerProperties,
getClassWeightParam,
getHyperPars, getLearnerId,
getLearnerNote,
getLearnerPackages,
getLearnerParVals,
getLearnerParamSet,
getLearnerPredictType,
getLearnerShortName,
getLearnerType,
helpLearnerParam,
helpLearner, makeLearners,
makeLearner, removeHyperPars,
setHyperPars, setId,
setLearnerId,
setPredictThreshold,
setPredictType