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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 check_downloaded_files_sizes(self):
 """ Make sure the files sizes are correct. Since we manually create the files this will only catch overruns. Raises ValueError if there is a problematic file. """

        for file_url in self.file_urls:
            local_path = file_url.get_local_path(self.dest_directory)
            self.check_file_size(file_url.size, local_path)