ServiceContext sc = ri.get_request_service_context(sasContextId);
Any any = codec.decode_value(sc.context_data, SASContextBodyHelper.type());
SASContextBody contextBody = SASContextBodyHelper.extract(any);
if (contextBody != null) {
if (contextBody.discriminator() == MTMessageInContext.value) {
// should not happen, as stateful context requests are always negotiated down to stateless in this implementation.
long contextId = contextBody.in_context_msg().client_context_id;
threadLocal.sasReply = createMsgCtxError(contextId, 4 /* major status: no context */);
throw new NO_PERMISSION("SAS context does not exist.");
} else if (contextBody.discriminator() == MTEstablishContext.value) {