CaseData is an S4 class that inherits from Andromeda. It contains
information on cases.
A CaseData object is typically created using getDbCaseData, can only be saved using
saveCaseData, and loaded using loadCaseData.
# S4 method for CaseData
show(object)
# S4 method for CaseData
summary(object)An object of class `CaseData`.