Variable usageMetadataSchemaConst

usageMetadataSchema: ZodObject<
    {
        cache_write_tokens: ZodOptional<ZodNullable<ZodNumber>>;
        cached_input_tokens: ZodOptional<ZodNullable<ZodNumber>>;
        input_tokens: ZodOptional<ZodNullable<ZodNumber>>;
        output_tokens: ZodOptional<ZodNullable<ZodNumber>>;
        reasoning_tokens: ZodOptional<ZodNullable<ZodNumber>>;
        total_tokens: ZodOptional<ZodNullable<ZodNumber>>;
    },
    $loose,
> = ...