REGEXP_FILE
  RegExpPatternImpl: <a*(b*c*)>
    RegExpBranchImpl: <a*(b*c*)>
      RegExpClosureImpl: <a*>
        RegExpCharImpl: <a>
          PsiElement(CHARACTER)('a')
        RegExpQuantifierImpl: <*>
          PsiElement(STAR)('*')
      RegExpGroupImpl: <(b*c*)>
        PsiElement(GROUP_BEGIN)('(')
        RegExpPatternImpl: <b*c*>
          RegExpBranchImpl: <b*c*>
            RegExpClosureImpl: <b*>
              RegExpCharImpl: <b>
                PsiElement(CHARACTER)('b')
              RegExpQuantifierImpl: <*>
                PsiElement(STAR)('*')
            RegExpClosureImpl: <c*>
              RegExpCharImpl: <c>
                PsiElement(CHARACTER)('c')
              RegExpQuantifierImpl: <*>
                PsiElement(STAR)('*')
        PsiElement(GROUP_END)(')')