> ## Documentation Index > Fetch the complete documentation index at: https://openrouter.ai/docs/llms.txt > Use this file to discover all available pages before exploring further. # BatchProviderPreferencesOnly ## Supported Types ### ProviderName ```go theme={null} batchProviderPreferencesOnly := components.CreateBatchProviderPreferencesOnlyProviderName(components.ProviderName{/* values here */}) ``` ### ```go theme={null} batchProviderPreferencesOnly := components.CreateBatchProviderPreferencesOnlyStr(string{/* values here */}) ``` ## Union Discrimination Use the `Type` field to determine which variant is active, then access the corresponding field: ```go theme={null} switch batchProviderPreferencesOnly.Type { case components.BatchProviderPreferencesOnlyTypeProviderName: // batchProviderPreferencesOnly.ProviderName is populated case components.BatchProviderPreferencesOnlyTypeStr: // batchProviderPreferencesOnly.Str is populated } ```