Function transcode 

pub fn transcode<'de, D, S>(de: &mut D, ser: &mut S) -> Result<(), Error>
where
    D: Deserializer<'de> + ?Sized,
    S: Serializer + ?Sized,

Transcodes a value from a deserializer into a serializer.

This reads the next value of the deserializer and serializes it. To transcode many values, Transcoder reuses the buffer.