Drools user can not use a generic type for a function's parameter in DRL

Issue

User can not use a generic type for a function's parameter in DRL.

How to reproduce the issue
- On business-central, write a drl like this. If I click "validate" button, it says ok

import java.util.List

function void getMinFrom(List lists) {
  System.out.println("hello");
}

rule hello
 when
 then
   System.out.println("Hello");
end

• Modify the drl as follows. If I click "validate" button, error messages[1] shows up

import java.util.List

function void getMinFrom(List<String> lists) {
  System.out.println("hello");
}

rule hello
 when
 then
   System.out.println("Hello");
end

[1]Validation Error

[ function getMinFrom (line:4): Unable to resolve type List<String> while building function. java.lang.ClassNotFoundException: Unable to find class 'List<String>' ]