Use the mscgen convention for => (calls) and << (responses)
Use the mscgen convention for => (calls) and << (responses)

djs55/message-switch,djs55/message-switch-1,djs55/message-switch,xapi-project/message-switch,xapi-project/message-switch,xapi-project/message-switch,djs55/message-switch-1,djs55/message-switch-1,djs55/message-switch