def METHOD_NAME(self):
    z_L = 0.8
    z_S = 3.0
    from astropy.cosmology import FlatLambdaCDM
    cosmo = FlatLambdaCDM(H0=70, Om0=0.3, Ob0=0.05)
    self.lensCosmo = LensCosmo(z_L, z_S, cosmo=cosmo)