fun <AllT, EachT : Any, ValueT> NullableOption<EachT, ValueT>.transformAll(transform: CallsTransformer<EachT, AllT>): OptionWithValues<AllT, EachT, ValueT>
Transform all calls to the option to the final option type.
The input is a list of calls, one for each time the option appears on the command line. The values in the list are the output of calls to transformValues. If the option does not appear from any source (command line or envvar), this will be called with an empty list.