Newbie - getting the session?

[Antony Grinyer]

Apologies is this is simple question, however how to you get the session
object in axis2? I have a simple class which exposes all my services, I
am able to get the axis configuration with:

private AxisConfiguration m_ac = null;

public void init(MessageContext mc)
{
  m_ac = mc.getSystemContext().getAxisConfiguration();
} 

...however I am unsure where I get the session object from? Again, I
apologize if this is simple, I am new to axis/axis2.

Thanks,
Ant