coder transforms between strings and
object structures, such as lists and maps, using the JSON format.</p>
<p>UTF-8 is a common variable-width encoding that can represent
every character in the Unicode character set.
The UTF-8 encoder/decoder transforms between Strings and bytes.</p>
<p>Converters are often used with streams
to transform the data that comes through the stream
as it becomes available.
The following code uses two converters.
The first is a UTF-8 decoder, which converts the data from bytes to 