StoppingStopping is a class for stopping rules.
report_label(string)
a label for the stopping report. The meaning
of this parameter is twofold. If it is equal to NA_character_ (default),
the report_label will not be used in the report at all. Otherwise, if it
is specified as an empty character (i.e. character(0)) in a user constructor,
then a default, class-specific label will be created for this slot.
Finally, for the remaining cases, a user can provide a custom label.
StoppingList, StoppingCohortsNearDose, StoppingPatientsNearDose,
StoppingMinCohorts, StoppingMinPatients, StoppingTargetProb,
StoppingMTDdistribution, StoppingTargetBiomarker, StoppingHighestDose
StoppingMTDCV, StoppingLowestDoseHSRBeta, StoppingSpecificDose.