@type t() :: %ExBifrost.Model.ImageGeneration200ResponseUsage{
  input_tokens: integer() | nil,
  input_tokens_details:
    ExBifrost.Model.ImageGeneration200ResponseUsageInputTokensDetails.t() | nil,
  output_tokens: integer() | nil,
  output_tokens_details:
    ExBifrost.Model.ImageGeneration200ResponseUsageInputTokensDetails.t() | nil,
  total_tokens: integer() | nil
}