<caret_1>:
  KDocName(628,649): 'Derived.someExtension'
    null

<caret_2>:
  KDocName(655,677): 'Derived.someExtension2'
    null

<caret_3>:
  KDocName(683,705): 'Derived.someExtension3'
    null

<caret_4>:
  KDocName(711,733): 'Derived.someExtension4'
    null

<caret_5>:
  KDocName(739,773): 'DerivedWithIterable.someExtension4'
    null