@classmethod
def is_ray(cls, geom):
    """Return whether ``geom`` is a ray-like object or not.

		:param geom:
		:type geom: type of :attr:`Geom.inner_object`
		:return: True if ``geom`` is an instance of the class representing a
			ray in the adapted library
		:rtype: bool

		"""
    raise NotImplementedError()
