REGEXP_FILE
  RegExpPatternImpl: <1*>
    RegExpBranchImpl: <1*>
      RegExpClosureImpl: <1*>
        RegExpCharImpl: <1>
          PsiElement(CHARACTER)('1')
        RegExpQuantifierImpl: <*>
          PsiElement(STAR)('*')
          PsiErrorElement:Dangling quantifier '*'
            <empty list>
  PsiElement(STAR)('*')