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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def ipa_chars(self, value):
 """ Set the list of IPAChar objects composing the IPA string :param list value: list of IPAChar objects """

        if value is None:
            self.__ipa_chars = []
        else:
            if is_list_of_ipachars(value):
                self.__ipa_chars = value
            else:
                raise TypeError("ipa_chars only accepts a list of IPAChar objects")