How to infer the specific return type of a method with a generic return type?

Given the following interface:

interface Random extends java.util.function.Supplier<Integer> { }

with java.util.function.Supplier looking like this (abbreviated):

public interface Supplier<T> { T get(); }

Now consider the following:

java.lang.reflect.Method get = Random.class.getMethod("get");
System.out.println(get.getReturnType()); // prints `class java.lang.Object`
System.out.println(get.getGenericReturnType()); // prints `T`

How can I infer that the return type should actually be java.lang.Integer?