@Override
public void emitRendezvous(Context context) {
ModelFactory f = context.getModelFactory();
OperatorDescription desc = context.getOperatorDescription();
InputBuffer bufferKind = desc.getAttribute(InputBuffer.class);
assert bufferKind != null;
List<Expression> arguments = Lists.create();
List<ListBufferMirror> buffers = Lists.create();
for (FlowElementPortDescription input : desc.getInputPorts()) {