How to take the handles of simulink function block?

I am facing an issue for finding the port handles of Simulink function block.in simulink function block i have placed inport block,after that i trying to get the handles.If command get_param(gcb, ’PortHandles’) is used then port handles are showing as Inport (as shown in figure) Instead of gcb if I use name it is showing as Outport(as showing in figure),is there any other way to get the port handles of the block.

Note:i think you can find the simulink function block in matlab 2016 or 2017