code: def _get(self, k, obj=None):
          'Return Option object for k in context of obj. Cache result until any set().'
          opt = self._cache.get((k, obj), None)
          if opt is None:
              opt = self._opts._get(k, obj)
              self._cache[(k, obj or vd.sheet)] = opt
          return opf _get(self, k, obj=None):
          'Return Option object for k in context of obj. Cache result until any set().'
          opt = self._cache.get((k, obj), None)
          if opt is None:
              opt = self._opts._get(k, obj)
              self._cache[(k, obj or vd.sheet)] = opt
          return opt
docs: Return Option object for k in context of obj. Cache result until any set().