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    CustomRankingParams(mapping=None, *, ignore_unknown_fields=False, **kwargs)

Configuration parameters for the Custom Ranking feature.

| ## Attribute ||
|---|---|
| **Name** | **Description** |
| `expressions_to_precompute` | `MutableSequence[str]` Optional. A list of ranking expressions (see `ranking_expression` for the syntax documentation) to evaluate. The evaluation results will be returned in `SearchResponse.SearchResult.rank_signals.precomputed_expression_values` field. |