REGEXP_FILE
  RegExpPatternImpl: <\k<adsf>>
    RegExpBranchImpl: <\k<adsf>>
      RegExpNamedGroupRefImpl: <\k<adsf>>
        PsiElement(RUBY_NAMED_GROUP_REF)('\k<')
        PsiElement(NAME)('adsf')
        PsiElement(GT)('>')