@classmethod
def rect(cls, dcode, width, height, hole_diameter=None, hole_width=None,
    hole_height=None):
    """Create a rectangular aperture definition statement"""
    if hole_diameter is not None and hole_diameter > 0:
        return cls('AD', dcode, 'R', ([width, height, hole_diameter],))
    elif hole_width is not None and hole_width > 0 and hole_height is not None and hole_height > 0:
        return cls('AD', dcode, 'R', ([width, height, hole_width,
            hole_height],))
    return cls('AD', dcode, 'R', ([width, height],))
