def METHOD_NAME(self):
    NotUsedItem = {}
    DecItem, DecComments = self.ParseDecContent()
    InfDscFdfContent = self.ParserDscFdfInfFile()
    for LineNum in list(DecItem.keys()):
        DecItemName = DecItem[LineNum]
        Match_reg = re.compile("(?<![a-zA-Z0-9_-])%s(?![a-zA-Z0-9_-])" % DecItemName)
        MatchFlag = False
        for Line in InfDscFdfContent:
            if Match_reg.search(Line):
                MatchFlag = True
                break
        if not MatchFlag:
            NotUsedItem[LineNum] = DecItemName
    self.Display(NotUsedItem)
    return NotUsedItem, DecComments