code: def update_step(
      self,
      epoch: int,
      global_step: int,
      decay: float = 0.95,
      S: int = 128,
      **kwargs,
  ):
      pass
  
file_path: NeMo/nemo/collections/multimodal/modules/nerf/renderers/nvdiffrast_renderer.py
imports: import math
  import numpy
  import nvdiffrast.torch
  import torch
  import torch.nn.functional
  from nemo.collections.multimodal.modules.nerf.geometry.dmtet import DeepMarchingTetrahedra
  from nemo.collections.multimodal.modules.nerf.geometry.nerf_base import DensityActivationEnum
  from nemo.collections.multimodal.modules.nerf.renderers.base_renderer import BaseRenderer
label_desc: Use image node_id 2 for calling the NVDiffRastRenderer obj's underlying member method code with example usage: obj.update_step(epoch, global_step, decay, S) without return types