# UnstableLegacyPromptVariableMapping
## Properties
**variable** | **String** | |
**langfuse_object** | [**models::UnstableLegacyEvaluationObject**](UnstableLegacyEvaluationObject.md) | |
**object_name** | Option<**String**> | Observation name to match, or `null` when `langfuseObject` is `trace` or `dataset_item`. |
**source** | **String** | |
**json_path** | Option<**String**> | | [optional]
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