Understanding Metadata Contents When Receiving Live Views

When processing live view images using the following methods in OLYCamera LiveViewListener, is there any document that describes the information stored in the metadata that can be retrieved simultaneously?
It seems that only Orientation information is included all the time, but is this normal?

void onUpdateLiveView (OLYCamera camera, byte[]data, Map<String, Object>metadata)

Olympus Camera Kit ver 1.1.1

Thank you in advance.