'Get the string arguments that should be added to an OpenID
message for this extension.
@returns: A dictionary of completely non-namespaced arguments
to be added. For example, if the extension\'s alias is
\'uncle\', and this method returns {\'meat\':\'Hot Rats\'}, the
final message will contain {\'openid.uncle.meat\':\'Hot Rats\'}'

def getExtensionArgs(self):

    raise NotImplementedError
