@classmethod
def circle(cls, dcode, diameter, hole_diameter=None, hole_width=None,
    hole_height=None):
    """Create a circular aperture definition statement"""
    if hole_diameter is not None and hole_diameter > 0:
        return cls('AD', dcode, 'C', ([diameter, 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, 'C', ([diameter, hole_width, hole_height],))
    return cls('AD', dcode, 'C', ([diameter],))
