Temporary Emissive Override

Debugging Shaders can require to route something into the emmisive channel to see if things work as expected. Many times i need to do this and so i have to unplug all other inputs and reconnect them afterwards. It can get very tedious. It would be great to have another input just for this debugging purpose. All other inputs should be ignored when something is connected into this debugging input and everything should be back to normal when nothing is connected.