> ## 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. # ChatRequestStop Stop sequences (up to 4) ## Supported Types ### ```go theme={null} chatRequestStop := components.CreateChatRequestStopStr(string{/* values here */}) ``` ### ```go theme={null} chatRequestStop := components.CreateChatRequestStopArrayOfStr([]string{/* values here */}) ``` ## Union Discrimination Use the `Type` field to determine which variant is active, then access the corresponding field: ```go theme={null} switch chatRequestStop.Type { case components.ChatRequestStopTypeStr: // chatRequestStop.Str is populated case components.ChatRequestStopTypeArrayOfStr: // chatRequestStop.ArrayOfStr is populated } ```