Optional
dataFull resource name of DataStore, such as Format: projects/{project}/locations/{location}/collections/{collection}/dataStores/{dataStore}
Optional
filterOptional. Filter specification to filter documents in the data store specified by data_store field. For more information on filtering, see Filtering
Define data stores within engine to filter on in a search call and configurations for those data stores. For more information, see https://cloud.google.com/generative-ai-app-builder/docs/reference/rpc/google.cloud.discoveryengine.v1#datastorespec