> As `TracingParameterNodeAtInstant` is a wrapper for `ParameterNodeAtInstant` > which allows iteration and the use of `contains`, it was not possible > to use those on a `TracingParameterNodeAtInstant`
New features
- Allows iterations on `TracingParameterNodeAtInstant` - Allows keyword `contains` on `TracingParameterNodeAtInstant`
41.2.0
Technical changes
- Fix `openfisca-core` Web API error triggered by `Gunicorn` < 22.0. - Bump `Gunicorn` major revision to fix error on Web API. Source: https://github.com/benoitc/gunicorn/issues/2564