https://docs.cloud.google.com/dotnet/docs/reference/Google.Cloud.DiscoveryEngine.V1Beta/latest/Google.Cloud.DiscoveryEngine.V1Beta.GroundedGenerationContent.Types.Part.DataOneofCase
Discovery Engine v1beta API - Enum GroundedGenerationContent.Types.Part.DataOneofCase...
discovery engineapienumtypespart