html_url,issue_url,id,node_id,user,created_at,updated_at,author_association,body,reactions,performed_via_github_app,issue
https://github.com/pydata/xarray/pull/4029#issuecomment-624081217,https://api.github.com/repos/pydata/xarray/issues/4029,624081217,MDEyOklzc3VlQ29tbWVudDYyNDA4MTIxNw==,1197350,2020-05-05T14:14:09Z,2020-05-05T14:14:09Z,MEMBER,"This is great Stephan. Perhaps you could also update the `to_zarr` docstring to make it more consistent with `to_netcdf` and explicitly describe this behavior. For `to_netcdf`, we say
>  If mode=’a’, existing variables will be overwritten.

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