@type t() :: %Gemini.Types.Response.Candidate{
  citation_metadata: Gemini.Types.Response.CitationMetadata.t() | nil,
  content: Gemini.Types.Content.t() | nil,
  finish_reason: String.t() | nil,
  grounding_attributions: [Gemini.Types.Response.GroundingAttribution.t()],
  index: integer() | nil,
  safety_ratings: [Gemini.Types.Response.SafetyRating.t()],
  token_count: integer() | nil
}