code: def set_inference_mode(self, value):
      self.inference = value
  
imports: import torch
  import torch.nn.functional
  from nemo.collections.multimodal.modules.imagen.sampler.batch_ops import batch_mul
  from nemo.collections.multimodal.modules.imagen.sampler.continuous_ddpm import GaussianDiffusionContinuousTimes
  from nemo.collections.multimodal.parts.utils import randn_like
label_desc: Use image node_id 2 for calling the PrecondModel obj's underlying member method code with example usage: obj.set_inference_mode(value) without return types