def setDefaultCaseList(self, case_set_id, study=None, study_name=None):

        study = self._getStudyId(study, study_name)
        case_list = self._getCaseListId(case_set_id, study=study)

        if not study == self.study:
            self.setDefaultStudy(study)

        self.case_list = case_list
set the default case list. If study is not specified the default
dataset/ETHPy150Open CGATOxford/cgat/CGAT/CBioPortal.py/CBioPortal.setDefaultCaseList