## Interface `AggregationsChiSquareHeuristic`

| Name | Type | Description |
| - | - | - |
| `background_is_superset` | boolean | Set to `false` if you defined a custom background filter that represents a different set of documents that you want to compare to. |
| `include_negatives` | boolean | Set to `false` to filter out the terms that appear less often in the subset than in documents outside the subset. |