def METHOD_NAME(self, r, rho0, Rs, e1=0, e2=0):
    """Mass enclosed projected 2d sphere of radius r.
    :param r: projected radius
    :param rho0: density normalization
    :param Rs: Hernquist radius
    :return: mass enclosed 2d projected radius
    """
    return self.spherical.METHOD_NAME(r, rho0, Rs)