Can't seem to find the referenced Avro media classes: Image, Media, and MediaContent

[wintsonpryme]

The serializers in the serializers.avro directory all have media imports that do not exist in the library.
The media sub-directory under the serializers.avro directory does not exist.
Here are the non-existent imports:

import serializers.avro.media.Image;
import serializers.avro.media.Media;
import serializers.avro.media.MediaContent;

What am I missing?

[cowtowncoder]

Project is built using make, so do that. It will generate and compile various classes.