code: def _where(self, filter_fn):
          ''' use this to filter VLists, simply provide a filter function to filter the current found objects '''
          assert callable(filter_fn), 'filter_fn needs to be callable'
          return VList(i for i in self if filter_fn(i())f _where(self, filter_fn):
          ''' use this to filter VLists, simply provide a filter function to filter the current found objects '''
          assert callable(filter_fn), 'filter_fn needs to be callable'
          return VList(i for i in self if filter_fn(i()))
docs: use this to filter VLists, simply provide a filter function to filter the current found objects