useMutation type error

[yveeven]

useMutation: <TQueryFnData extends TDef['output'] = TDef['output'], TData = TQueryFnData, PickKeys extends KeysOf<TData> = KeysOf<TData>>(opts?: Omit<AsyncDataOptions<TQueryFnData, TData, PickKeys>, 'lazy' | 'watch'>) => AsyncData<PickFrom<TData, PickKeys> | null, TRPCClientErrorLike<TDef>> & {
        /**
         * The function to call to trigger the mutation.
         */
        mutate: (input: TDef['output']) => Promise<UnwrapRef<AsyncData<PickFrom<TData, PickKeys> | null, TRPCClientErrorLike<TDef>>['data']>>;
        trpc?: TRPCRequestOptions;
    };

I think TDef['output'] here should be TDef['input'] instead.
isn't it input when mutate is used?