SHELL_SCRIPT
  COMMANDS_LIST
    GENERIC_COMMAND_DIRECTIVE
      OLD_ARITHMETIC_EXPANSION
        PsiElement(ARITH_SQUARE_LEFT)('$[')
        MUL_EXPRESSION
          LITERAL_EXPRESSION
            NUMBER
              PsiElement(int)('10')
          PsiElement(/)('/')
          LITERAL_EXPRESSION
            PsiElement($)('$')
            SHELL_PARAMETER_EXPANSION
              PsiElement({)('{')
              PsiElement(word)('num')
              PsiElement(})('}')
        PsiElement(ARITH_SQUARE_RIGHT)(']')