Detect if golang method is internal?

I'm writing a function that iterates over the methods on a given struct and binds the methods to handlers. I would like to skip over internal methods if possible. I'm not sure if this is possible to do so explicitly - I reviewed the documentation for the reflect package and I didn't see a means to detect if a given Value is an internal method. I know I can get the method's name, and then check if it starts with a lowercase character but I'm not sure if there's a kosher way to accomplish this. It's also possible that the internal / public boundary really only exists at compile time anyways, so there really isn't even a way of knowing this beyond the method's name. In either case I'd like to know for sure. Thanks!