D momentum to be added to the safety guidance at each diffusion step. If set to 0.0,
momentum is disabled. Momentum is built up during warmup for diffusion steps smaller than
sld_warmup_steps.   sld_mom_beta (float, optional, defaults to 0.4) —
Defines how safety guidance momentum builds up. sld_mom_beta indicates how much of the previous
momentum is kept. Momentum is built up during warmup for diffusion steps smaller than
sld_warmup_steps.   R