issues: 191889405

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id node_id number title user state locked assignee milestone comments created_at updated_at closed_at author_association active_lock_reason draft pull_request body reactions performed_via_github_app state_reason repo type
191889405 MDU6SXNzdWUxOTE4ODk0MDU= 1138 .rolling(...).count() ? 5635139 closed 0     5 2016-11-27T22:13:59Z 2017-06-26T18:43:06Z 2017-06-26T18:43:06Z MEMBER      

Should .count() be available on .rolling objects?

```python

  sample_count = array.rolling(**windows).count() - 1.0

E AttributeError: 'DataArrayRolling' object has no attribute 'count' ```

 
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   completed 13221727 issue

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