REGEXP_FILE
  RegExpPatternImpl: <abc.*?x+yz>
    RegExpBranchImpl: <abc.*?x+yz>
      RegExpCharImpl: <a>
        PsiElement(CHARACTER)('a')
      RegExpCharImpl: <b>
        PsiElement(CHARACTER)('b')
      RegExpCharImpl: <c>
        PsiElement(CHARACTER)('c')
      RegExpClosureImpl: <.*?>
        RegExpSimpleClassImpl: <.>
          PsiElement(DOT)('.')
        RegExpQuantifierImpl: <*?>
          PsiElement(STAR)('*')
          PsiElement(QUEST)('?')
      RegExpClosureImpl: <x+>
        RegExpCharImpl: <x>
          PsiElement(CHARACTER)('x')
        RegExpQuantifierImpl: <+>
          PsiElement(PLUS)('+')
      RegExpCharImpl: <y>
        PsiElement(CHARACTER)('y')
      RegExpCharImpl: <z>
        PsiElement(CHARACTER)('z')