JsonPathFile
  JsonPathRootSegmentImpl(ROOT_SEGMENT)
    PsiElement($)('$')
  JsonPathExpressionSegmentImpl(EXPRESSION_SEGMENT)
    PsiElement([)('[')
    JsonPathQuotedPathsListImpl(QUOTED_PATHS_LIST)
      JsonPathStringLiteralImpl(STRING_LITERAL)
        PsiElement(SINGLE_QUOTED_STRING)(''a'')
      PsiElement(,)(',')
      PsiWhiteSpace(' ')
      JsonPathStringLiteralImpl(STRING_LITERAL)
        PsiElement(SINGLE_QUOTED_STRING)(''x'')
    PsiElement(])(']')