def METHOD_NAME(cls, obj):
    """Construct a Rhino object wrapper from an existing Rhino object.
    Parameters
    ----------
    obj : :rhino:`Rhino_DocObjects_RhinoObject`
        The Rhino object.
    Returns
    -------
    :class:`~compas_rhino.geometry.RhinoGeometry`
        The Rhino object wrapper.
    Raises
    ------
    :class:`ConversionError`
        If the geometry of the Rhino DocObject cannot be converted to the geometry type of the wrapper.
    """
    wrapper = cls()
    wrapper.object = obj
    return wrapper