JSON to Protobuf not working

[fgtester]

Extender.py is failing to use a few methods, at least for me. I've replaced the following lines and it works.

line 99: body_string = utils.getRequestBody(messageInfo) 
with 
line 99: body_string = utils.getRequestBody(self, messageInfo)

and

line 130: body = self.getResponseBody(messageInfo)
with
line 130:  body = utils.getResponseBody(self, messageInfo)

Nice job on this tool, kudos