def mark_virt_column(self, mark_name):
        return int(vim.eval('virtcol("\'%s")' % mark_name)) - 1
A extension case should be able to save host case properties
dataset/ETHPy150Open nielsmadan/venom/autoload/vim_ext/vim_fn.py/_fn.mark_virt_column--crossover with--dataset/ETHPy150Open dimagi/commcare-hq/corehq/apps/app_manager/tests/test_extension_case.py/ExtCasePropertiesTests.test_ext_case_update_host_case