can we have both built in dissector and a plugin for the same protocol in wireshark?

I have created a built in dissector for a netscalar private protocol named NNM. Now I have beeen asked to convert it into a plugin. So I want to know if I can go on and create a plugin or I need to remove the dissector from the wireshark source first??

Can a plug in as well as a built dissector exist for the same protocol in the same build of Wireshark?

Any help??

Thanks and Regards, Sidharth