package main import fp "./goerror_fp" func Fold[A, B any](zero B, a A, f func(B, A) B) B { return f(zero, a) } func main() { var v any = "hello" Fold(fp.Seq[any]{}, v, func(seq fp.Seq[any], v any) fp.Seq[any] { return seq.Append(v) }) }