reflect: documentation on NumMethod is incorrect

[dsnet]

Consider the following:

type iface interface {
	private()
	Public()
}
t := reflect.TypeOf((*iface)(nil)).Elem()
for i := 0; i < t.NumMethod(); i++ {
	fmt.Println(t.Method(i))
}

This currently prints:

{Public  func() <invalid Value> 0}
{private main func() <invalid Value> 1}

The documented behavior of reflect.Type.NumMethod is:

NumMethod returns the number of exported methods in the value's method set.

However, you can clearly see that private is included as part of the count.

It seems to me that for reflect.Interface, the NumMethod does include unexported methods, while it excludes them for all other kinds.

[ALTree]

This is #22075.

[dsnet]

Duplicate indeed. Thank you.