def METHOD_NAME(self):
    """
    Return an element of ``self``.
    EXAMPLES::
        sage: H = HyperbolicPlane()
        sage: H.UHP().an_element()
        Point in UHP I
        sage: H.PD().an_element()
        Point in PD 0
        sage: H.KM().an_element()
        Point in KM (0, 0)
        sage: H.HM().an_element()
        Point in HM (0, 0, 1)
    """
    from sage.rings.integer_ring import ZZ
    return self(self.realization_of().PD().get_point(ZZ.zero()))