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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 load_data_file(path_of_file):
 """ Loads the content of a file by using json.load. :param path_of_file: the path of the file to load :return: the file content as a string :raises exceptions.ValueError: if the file was not found """

    if os.path.exists(path_of_file):
        return storage_utils.load_objects_from_json(path_of_file)
    raise ValueError("Data file not found: {0}".format(path_of_file))