[Varargs](https://nim-lang.org/docs/manual.html#types-varargs)
> A varargs parameter is an openarray parameter that additionally allows to > pass a variable number of arguments to a procedure. The compiler converts the > list of arguments to an array implicitly [Open arrays](https://nim-lang.org/docs/manual.html#types-open-arrays) > Openarrays are always indexed with an int starting at position 0. The len, > low and high operations are available for open arrays too. I think this documentation should _clearly_ state that strings, seqs and arrays are openarrays (actually the only ones).
