def METHOD_NAME(input_unit):
    """Converts a Android resource unit to a PO unit
    :return: None if empty or not for translation
    """
    if input_unit is None:
        return None
    # escape unicode
    output_unit = po.pounit(encoding="UTF-8")
    output_unit.addlocation(input_unit.getid())
    output_unit.source = input_unit.source
    output_unit.target = ""
    return output_unit