def split_file_urls_by_size(self, size):
        """
        Return tuple that contains a list large files and a list of small files based on size parameter
        :param size: int: size (in bytes) that determines if a file is large or small
        :return: ([ProjectFileUrl],[ProjectFileUrl]): (large file urls, small file urls)
        """
        large_items = []
        small_items = []
        for file_url in self.file_urls:
            if file_url.size >= size:
                large_items.append(file_url)
            else:
                small_items.append(file_url)
        return large_items, small_items