Hi
This is what I found out:
Actually you can change inputs and outputs for a specific property by calling "onPropertyChange" function.
You can use these methods to change the node:
"addInput", "addInputs", "addoutput", "addOutputs", "removeInput", "removeOutput", "changeIntputType" "changeOutputType"
I've made a node to show some examples.

This is one node with different properties.

Address: " Basic/IO_Changer "