log.Fatal("usage: encgen [--output filename]")
	}
	var b bytes.Buffer
	fmt.Fprintf(&b, "// Code generated by go run encgen.go -output %s; DO NOT EDIT.\n", *output)
	fmt.Fprint(&b, header)
	printMaps(&b, "Array")
	fmt.Fprint(&b, "\n")
	printMaps(&b, "Slice")
	for _, t := range types {
		fmt.Fprintf(&b, arrayHelper, t.lower, t.upper)
		fmt.Fprintf(&b, sliceHelper, t.lower, t.upper, t.zero, t.encoder)
	}

		log.Fatal("usage: decgen [--output filename]")
	}
	var b bytes.Buffer
	fmt.Fprintf(&b, "// Code generated by go run decgen.go -output %s; DO NOT EDIT.\n", *output)
	fmt.Fprint(&b, header)
	printMaps(&b, "Array")
	fmt.Fprint(&b, "\n")
	printMaps(&b, "Slice")
	for _, t := range types {
		fmt.Fprintf(&b, arrayHelper, t.lower, t.upper)
		fmt.Fprintf(&b, sliceHelper, t.lower, t.upper, t.decoder)
	}
	fmt.Fprintf(&b, trailer)

        val actual = prettyPrint {
            printMap(
                map = elementsByMarker,
                omitSingleKey = true,
                renderKey = { key, _ -> append("$key:") }
            ) { marker, byMarker ->
                val elementsByMarkerAndContext = byMarker.groupBy { it.context }
                printMap(
                    map = elementsByMarkerAndContext,