code: def _increment_flaky_attribute(cls, test_item, flaky_attribute):
          
          cls._set_flaky_attribute(test_item, flaky_attribute, cls._get_flaky_attribute(test_item, flaky_attribute) + 1)
docs: Increments the value of an attribute on a flaky test.
  
          :param test_item:
              The test callable on which to set the attribute
          :type test_item:
              `callable` or :class:`nose.case.Test` or :class:`Function`
          :param flaky_attribute:
              The name of the attribute to set
          :type flaky_attribute:
              `unicode`