Get value of the slot 'calculator'
getCalculator(object)# S4 method for AssessmentItem
getCalculator(object)
# S4 method for AssessmentSection
getCalculator(object)
# S4 method for character
getCalculator(object)
an instance of the S4 object (SingleChoice, MultipleChoice, Essay, Entry, Ordering, OneInRowTable, OneInColTable, MultipleChoiceTable, DirectedPair, TextGap, NumericGap, InlineChoice)