def METHOD_NAME(cobj, p):
    """Build Lennard Jones parameters and add callback for viscosity collision integral"""
    ChapmanEnskogLennardJones.build_lennard_jones_parameters(cobj)
    if not hasattr(cobj, "viscosity_collision_integral_callback"):
        cobj.viscosity_collision_integral_callback = (
            collision_integral_neufeld_callback
        )