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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 convert_xml_to_text(filename: str = None, blob: bytes = None, config: TextProcessingConfig = _DEFAULT_CONFIG) -> str: """ Converts XML to text. """

    with get_filelikeobject(filename, blob) as fp:
        soup = bs4.BeautifulStoneSoup(fp)
        return soup.get_text()