REGEXP_FILE
  RegExpPatternImpl: <[\w-z]>
    RegExpBranchImpl: <[\w-z]>
      RegExpClassImpl: <[\w-z]>
        PsiElement(CLASS_BEGIN)('[')
        RegExpSimpleClassImpl: <\w>
          PsiElement(CHAR_CLASS)('\w')
        RegExpCharImpl: <->
          PsiElement(CHARACTER)('-')
        RegExpCharImpl: <z>
          PsiElement(CHARACTER)('z')
        PsiElement(CLASS_END)(']')