<caret_1>:
  KDocName(54,65): 'test.extFun'
    null

<caret_2>:
  KDocName(71,77): 'extFun'
    null

<caret_3>:
  KDocName(86,96): 'Foo.extFun'
    null

<caret_4>:
  KDocName(102,117): 'test.Foo.extFun'
    null