Invokable.getReturnType(): cannot reproduce Guava's example from the official wiki

In the official Guava's TypeToken wiki, there is the following example:

Invokable<List<String>, ?> invokable = new TypeToken<List<String>>() {}.method(getMethod);
invokable.getReturnType(); // String.class

How getMethod is set?

I tried the following examples:

1. 
   

   First try:

   
   

   
   List<String> list = new ArrayList<String>();
   Class[] arg = { int.class };
   Method getMethod = list.getClass().getMethod("get", arg);
   Invokable<List<String>, ?> invokable = new TypeToken<List<String>>() {}.method(getMethod);
   System.out.println(invokable.getReturnType());
   
   

   
   

   It crashed with the following message:

   
   

   
   Exception in thread "main" java.lang.IllegalArgumentException: public java.lang.Object java.util.ArrayList.get(int) not declared by java.util.List<java.lang.String>
       at com.google.common.base.Preconditions.checkArgument(Preconditions.java:145)
       at com.google.common.reflect.TypeToken.method(TypeToken.java:495)
       at tmp.LaunchClass.main(LaunchClass.java:28)
   
   



2. 
   

   Second try (a little bit different though):

   
   

   
   List<String> list = new ArrayList<String>();
   Class[] arg = { int.class };
   Method getMethod = list.getClass().getMethod("get", arg);
   // changed here
   Invokable invokable = TypeToken.of(list.getClass()).method(getMethod);
   System.out.println(invokable.getReturnType());
   
   

   
   

   Doesn't crash, but doesn't return the expected result. Returned E. Expected result: String.class (as in the official wiki).