I have the following method

public List<? extends Parent> fetch(final LocalDate testDate) { 
   ..... 
   return list; 
}


@Test
void test_method() {
   List<? extends Parent> childList = List.of(child);


  when(serviceClass.fetch(DATE)).thenReturn(childList);
}

mockito doesnt seem to like the when and return message following:

Cannot resolve method 'thenReturn(List<capture of ? extends Parent>)'

I dont understand why