REGEXP_FILE
  RegExpPatternImpl: <(?i:*)>
    RegExpBranchImpl: <(?i:*)>
      RegExpGroupImpl: <(?i:*)>
        PsiElement(SET_OPTIONS)('(?')
        RegExpOptionsImpl: <i>
          PsiElement(OPTIONS_ON)('i')
        PsiElement(COLON)(':')
        RegExpPatternImpl: <*>
          RegExpBranchImpl: <*>
            PsiErrorElement:Dangling quantifier '*'
              <empty list>
            PsiElement(STAR)('*')
        PsiElement(GROUP_END)(')')