REGEXP_FILE
  RegExpPatternImpl: <a[b&&-b]>
    RegExpBranchImpl: <a[b&&-b]>
      RegExpCharImpl: <a>
        PsiElement(CHARACTER)('a')
      RegExpClassImpl: <[b&&-b]>
        PsiElement(CLASS_BEGIN)('[')
        RegExpIntersectionImpl: <b&&-b>
          RegExpCharImpl: <b>
            PsiElement(CHARACTER)('b')
          PsiElement(ANDAND)('&&')
          RegExpCharImpl: <->
            PsiElement(CHARACTER)('-')
          RegExpCharImpl: <b>
            PsiElement(CHARACTER)('b')
        PsiElement(CLASS_END)(']')