err = en.Append(0x80 | uint8(zb0001Len))
	if err != nil {
		return
	}
	if zb0001Len == 0 {
		return
	}
	// write "BaseOptions"
	err = en.Append(0xab, 0x42, 0x61, 0x73, 0x65, 0x4f, 0x70, 0x74, 0x69, 0x6f, 0x6e, 0x73)
	if err != nil {
		return
	}
	// map header, size 0
	_ = z.BaseOptions
	err = en.Append(0x80)
	if err != nil {
		return
	}
	// write "r"
	err = en.Append(0xa1, 0x72)

<pre>
string('a')       // "a"
string(-1)        // "\ufffd" == "\xef\xbf\xbd"
string(0xf8)      // "\u00f8" == "ø" == "\xc3\xb8"
type MyString string
MyString(0x65e5)  // "\u65e5" == "日" == "\xe6\x97\xa5"
</pre>
</li>

<li>
Converting a slice of bytes to a string type yields
a string whose successive bytes are the elements of the slice.

<pre>