@type t() :: %ExBifrost.Model.GeminiCreateCachedContentRequest{
  contents: [any()] | nil,
  displayName: String.t() | nil,
  expireTime: DateTime.t() | nil,
  model: String.t(),
  systemInstruction: %{optional(String.t()) => any()} | nil,
  toolConfig: any() | nil,
  tools: [any()] | nil,
  ttl: String.t() | nil
}