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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 __is_current(filepath):
    '''Checks whether file is current'''
    if not __DOWNLOAD_PARAMS['auto_update']:
        return True

    if not os.path.isfile(filepath):
        return False

    return datetime.datetime.utcfromtimestamp(os.path.getmtime(filepath)) \
        > __get_last_update_time()